Advance

TAKEMOTO Yasuhiko

    Department of Mechanical Engineering　Professor
Last Updated :2024/05/19

Researcher Information

Degree

  • Ph.D in Eng.（Osaka Prefecture University）

URL

J-Global ID

Research Interests

  • Industrial Management Engineering   Quality Management   Production Management   Operations Research   Applied Statistics   

Research Areas

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Control and systems engineering
  • Informatics / Statistical science
  • Natural sciences / Applied mathematics and statistics

Academic & Professional Experience

  • 2024/04 - Today  Kindai UniversityFaculty of Science and Engineering教授
  • 2017/04 - 2024/03  Kindai UniversityFaculty of Science and Engineering, Department of Mechanical Engineering准教授
  • 2007/10 - 2017/03  Prefectural University of HiroshimaFaculty of Management and Information Systems, Department of Management Information Systemms准教授
  • 2007/04 - 2007/09  University of HyogoSchool of Business Administration, Department of Strategic Management助教
  • 2004/04 - 2007/03  University of HyogoSchool of Business Administration, Department of Strategic Management助手

Education

  • 2002/04 - 2004/03  Osaka Prefecture University  Graduate School of Engineering  Division of Electrical Engineering and Information Science
  • 2000/04 - 2002/03  Osaka Prefecture University  Graduate School of Engineering  Division of Electrical Engineering and Information Science
  • 1996/04 - 2000/03  Osaka Prefecture University  School of Engineering  経営工学科

Association Memberships

  • 一般社団法人日本機械学会   オペレーションズ＆マネジメント・ストラテジー学会   一般社団法人日本品質管理学会   公益社団法人オペレーションズ・リサーチ学会   公益社団法人日本経営工学会   The Institute of Electrical and Electronics Engineers   

Published Papers

  • Yasuhiko Takemoto; Ikuo Arizono
    Wiley StatsRef: Statistics Reference Online Wiley 1 - 10 2023/02 [Refereed][Invited]
  • OHNISHI Jinna; YASE Hayato; IKEDA Atsutoshi; TAKEMOTO Yasuhiko; KAJIWARA Shinji; OHTSUBO Yoshikazu; KOSAKA Manabu
    Transactions of the JSME (in Japanese) The Japan Society of Mechanical Engineers 89 (924) 23-00104 - 23-00104 2023 
    Pneumatic rubber artificial muscles are nearly ideal for power assistance, medical care, and rehabilitation due to their lightweight drive unit made of rubber, which is soft and safe for human use. However, they have complex nonlinearities, including input saturation, hysteresis, and changes in static characteristics due to shrinkage. Additionally, when used with a human subject, the artificial muscle control system’s characteristics may vary based on the person’s physique, fitness, temperature, and the rubber’s deterioration. Therefore, it is desirable to be able to auto-tune the PID and other controllers in a short time before use. Data-driven controls such as FRIT and VRFT are suitable for auto-tuning in a short time. Among them, V-Tiger presented a procedure for predicting the actual closed-loop response and its Confidence interval. However, V-Tiger is not applicable to nonlinear systems with input saturation. This paper describes a procedure for (1) tuning PID gains by predicting the closed-loop response with V-Tiger in the presence of input saturation, (2) obtaining Confidence intervals for the predicted response affected by input saturation, and (3) how to use the Confidence intervals to apply this method to nonlinear systems.
  • Ikuo ARIZONO; Shuto TANABASHI; Yasuhiko TAKEMOTO
    Journal of Japan Industrial Management Association 73 (4) 189 - 209 2023/01 [Refereed]
     
    Probability inequalities are known as an effective means to evaluate the upper bound of upper probability for an average of some random variables based on only limited stochastic properties, e.g., expectation, variance, and codomain for each random variable. Among them, Hoeffding probability inequality has been known as one of the best theoretical ways for evaluating the upper bound of upper probability about an average of several random variables based on limited stochastic properties such as expectation, variance and codomain in each random variable. In this study, the authors address a study for essentially improving the performance of Hoeffding probability inequality. In consequence, a new probability inequality with more superior performance than Hoeffding probability inequality is derived.
  • Design Procedures for Variable Sampling Inspection Plans with Screening Indexed by Modified Quality Loss;Based on Importance of Squared Mean Deviation Variance
    Shirasu, K; Tanabashi, S; Arizono, I; Takemoto, Y
    22nd Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS) Proceedings 2022/11 [Refereed]
  • Analytical Model Based on the Concept of Statistical Mechanics for M/M/1 Queueing System with Reneging
    Tagami, Y; Arizono, I; Takemoto, Y
    22nd Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS) Proceedings 2022/11 [Refereed]
  • Change Point Detection for Multiple Linear Trend Changes
    Tanabashi, S; Takemoto, Y; Arizono, I
    22nd Asian Pacific Industrial Engineering;Management Systems Conference (APIEMS) Proceedings 2022/11 [Refereed]
  • Yasuhiko Takemoto; Ikuo Arizono
    Quality and Reliability Engineering International Wiley 38 (6) 3062 - 3071 0748-8017 2022/10
  • Shuto TANABASHI; Ikuo ARIZONO; Yasuhiko TAKEMOTO
    日本経営工学会論文誌 73 (2) 70 - 73 2022/07 [Refereed]
     
    Hoeffding probability inequality has been known as one of the best theoretical ways for evaluating the upper bound of upper probability about an average of several random variables based on limited stochastic properties such as expectation, variance and domain in each random variable. In this study, we address a fundamental study to make some issues clear for essentially improving the performance of Hoeffding probability inequality.
  • Ikuo Arizono; Yasuhiko Takemoto
    RAIRO - Operations Research EDP Sciences 56 (4) 2581 - 2593 0399-0559 2022/07 [Refereed]
     
    There are many studies about negotiation procedures for contract problems in supply chains. Several recent papers have considered a new negotiation procedure for a repurchase contract problem in a supply chain consisting of a manufacturer and a retailer. There, usually, are some wholesalers between a manufacturer and a retailer. Therefore, a supply chain including some wholesalers in addition to a manufacturer and a retailer should be considered. In this study, we call the supply chain in which three or more members are arranged in series the tandem supply chain. We, firstly, address a negotiation problem for a contract about wholesale and repurchase prices in the tandem supply chain in which three members, that is, a manufacturer, a wholesaler and a retailer are arranged in series. The whole contract in the tandem supply chain is composed of two contracts dependent mutually, i.e., the contract between the manufacturer and wholesaler and the contract between the wholesaler and retailer. The collaborative bargaining solution in the tandem supply chain consisting of three members is discussed. This paper, finally, formulates the tandem supply chain including several wholesalers.
  • Ikuo Arizono; Yasuhiko Takemoto
    Journal of Industrial & Management Optimization American Institute of Mathematical Sciences (AIMS) 18 (1) 25 - 25 1547-5816 2022 

    <p style='text-indent:20px;'>Behavior that a customer who has just arrived at a crowded queueing system leaves without joining the queue is known as the phenomenon of balking. Queueing systems with balking have been studied continually as one of significant subjects. In this paper, the theoretical approach for the steady-state analysis of the Markovian queueing systems with balking is considered based on the concept of the statistical mechanics. Here, it can be easily seen that the strength of balking is not constant but various in each queueing systems. Note that the strength of balking means how degree a customer who has just arrived at a crowded queueing system leaves without joining the queue. In our approach, under considering the difference of the strength of balking for each queueing systems, we have proposed a statistical mechanics model for analyzing the M/M/<inline-formula><tex-math id="M1">\begin{document}$ s $\end{document}</tex-math></inline-formula> queueing system with balking by introducing a parameter influencing the strength of balking. Further, we define a procedure for estimating the model parameter influencing the strength of balking. In addition, we consider a method of improving the performance of the M/M/<inline-formula><tex-math id="M2">\begin{document}$ s $\end{document}</tex-math></inline-formula> queueing system with balking by utilizing the statistical mechanics approach.</p>

  • Shuto TANABASHI; Yasuhiko TAKEMOTO; Ikuo ARIZONO
    Journal of Japan Industrial Management Association 72 (3) 159 - 168 2021/10 [Refereed]
     
    Understanding the state transition of a process from the time series data obtained from the process is important from the viewpoint of both analyzing and controlling the process. In particular, it is important to clarify a turning point of the state transition, that is, the point of change in the process and to find the cause of the state transition by observing and analyzing the data from the process. This paper considers the method of detecting several change points in a process based on the likelihood theory and information criterion when a series of data from the process follows the Poisson process. Then, the method of finding any process state fluctuation and points of change is called “the process state track- ing method”. The validity and applicability of the process state tracking method introduced in this paper is confirmed through some numerical applications.
  • A State Tracing Method;for the;System;Data Obeying;Poisson Distribution
    Tanabashi, S; Torisaka, Y; Takemoto, Y; Arizono, I
    The 26th International Conference on Production Research (ICPR2021) 2021/07 [Refereed]
  • Variable Sampling Plan Indexed by Taguchi’s Quality Loss under Emphasized Difference of Mean
    Tanabashi, S; Arizono, I; Takemoto, Y
    The 26th International Conference on Production Research (ICPR2021) 2021/07 [Refereed]
  • 直列型サプライ・チェーンにおける限られた需要情報のもとでの契約問題の協調的交渉解
    有薗育生; 竹本康彦; 末廣貴俊
    日本経営工学会論文誌 72 (2) 99 - 109 2021/07 [Refereed]
  • Ikuo Arizono; Yasuhiko Takemoto
    RAIRO - Operations Research EDP Sciences 55 S327 - S341 0399-0559 2021/02 [Refereed]
     
    The phenomenon of balking has been considered frequently in the steady-state analysis of the M/M/1 queueing system. Balking means the phenomenon that a customer who arrives at a queueing system leaves without joining a queue, since he/she is disgusted with the waiting queue length at the moment of his/her arrival. In the traditional studies for the steady-state analysis of the M/M/1 queueing system with balking, it has been typically assumed that the arrival rates obey an inverse proportional function for the waiting queue length. In this study, based on the concept of the statistical mechanics, we have a challenge to extend the traditional steady-state analysis model for the M/M/1 queueing system with balking. As the result, we have defined an extended analysis model for the M/M/1 queueing system under the consideration of the change in the directivity strength of balking. In addition, the procedure for estimating the strength of balking in this analysis model using the observed data in the M/M/1 queueing system has been also constructed.
  • Ryosuke Hirata; Ikuo Arizono; Yasuhiko Takemoto
    Quality Technology & Quantitative Management Informa UK Limited 18 (1) 117 - 133 2021/01 [Refereed]
  • Takemoto, Y; Arizono, I
    The 9th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2020) 2020/08 [Refereed]
  • Hoeffdingの確率不等式の性能向上のための数値解析的手法に関する研究
    光岡拓夢; 有薗育生; 竹本康彦
    日本経営工学会論文誌 71 (2) 76 - 79 2020/07 [Refereed]
  • Yasuhiko Takemoto; Ikuo Arizono
    International Journal of Production Research Informa UK Limited 58 (8) 2510 - 2526 0020-7543 2020/04 [Refereed]
  • Ryosuke Tomohiro; Ikuo Arizono; Yasuhiko Takemoto
    International Journal of Production Economics Elsevier BV 221 107468 - 107468 0925-5273 2020/03 [Refereed]
  • Study on Preventive Maintenance for Priority Standby Redundant System
    Hirata, R; Arizono, I; Takemoto, Y
    Proceedings of 9th IFAC Conference on Manufacturing Modelling, Management and Control 195 - 200 2019/08 [Refereed]
  • Study on State Transition Tracking Method in Process Fraction Nonconforming
    Takemoto, Y; Arizono, Y
    Proceedings of 9th IFAC Conference on Manufacturing Modelling, Management and Control 145 - 149 2019/08 [Refereed]
  • Yasuhiko Takemoto; Ikuo Arizono
    Quality Technology & Quantitative Management Informa UK Limited 16 (4) 496 - 510 2019/07 [Refereed]
  • 品質損失を評価基準とする計量規準型2段抜取検査の提案
    有薗育生; 友廣亮介; 竹本康彦
    日本経営工学会論文誌 69 (3) 131 - 142 2018/10 [Refereed]
  • A Study on Joinpoint Regression Model Using Log-likelihood and Information Criterion
    Takemoto, Y; Arizono, I
    Proceedings of 180th The IIER International Conference 23 - 26 2018/08
  • Reliability Analysis in 2-Component Standby Redundant System with Priority Through maximum Entropy Principle
    Hirata, R; Arizono, I; Takemoto, Y
    Proceedings of 180th The IIER International Conference 10 - 16 2018/08
  • Wakana Kato; Ikuo Arizono; Yasuhiko Takemoto
    Journal of Intelligent Manufacturing Springer Science and Business Media LLC 29 (3) 559 - 567 1572-8145 2018/03 [Refereed]
  • Development of Reliability Function in 2-Conponent Standby Redundant System with Priority Based on Maximum Entropy Principl
    Hirata, R; Arizono, I; Tomohiro, R; Oigawa, S; Takemoto, Y
    Lecture Notes in Engineering and Computer Science: Proceedings of The International MultiConference of Engineers and Computer Scientists 2018, 14-16 March, 2018 765 - 770 2018/03 [Refereed]
  • A Study of Compensation Problem for Uncertainty of Quality in Supply Chain
    Takemoto, Y; Arizono, I
    Lecture Notes in Engineering and Computer Science: Proceedings of The International MultiConference of Engineers and Computer Scientists 2018 771 - 776 2018/03 [Refereed]
  • Ikuo Arizono; Yusuke Okada; Ryosuke Tomohiro; Yasuhiko Takemoto
    The International Journal of Advanced Manufacturing Technology Springer Science and Business Media LLC 94 (1-4) 145 - 154 0268-3768 2018/01 [Refereed]
  • Study on Collaborative Bargaining Solution for Contract Problem in Tandem Supply Chain Consisting of Three Members
    Suehiro, T; Arizono, I; Tsurui, S; Takemoto, Y
    Proceedings of 18th Asia Pacific Industrial Engineering and Management Systems 2017 (APIEMS2017) B (3) 19 - 24 2017/12 [Refereed]
  • Shin Tsurui; Yasuhiko Takemoto; Ikuo Arizono; Ryosuke Tomohiro
    International Journal of Supply Chain and Operations Resilience Inderscience Publishers 3 (1) 34 - 55 2052-868X 2017/09 [Refereed]
  • Economic Design of Double Sampling Cpm Control Chart for Monitoring Process Capability Index
    Tomohiro, R; Arizono, I; Takemoto, Y
    Proceedings of 24th International Conference on Production Research (ICPR2017) 2017/07 [Refereed]
  • ARIZONO Ikuo; OIGAWA Satoshi; TOMOHIRO Ryosuke; TAKEMOTO Yasuhiko
    Journal of Japan Industrial Management Association 公益社団法人 日本経営工学会 68 (2) 120 - 123 1342-2618 2017/07 [Refereed]
     
    <p>In recent years, under the limited information that the means and variances of the failure and repair times are just given, the method of evaluating MTTF in the two-component standby redundancy system with priority has been proposed. In this study, by expanding the idea to evaluate MTTF proposed in the previous research, an evaluation method for the variance of the failure times in the aforementioned system is established under the premise that the means and variances of the failure and repair times are just given. Through numerical verification, the usefulness of the evaluation method constructed in this study is reconfirmed.</p>
  • TSURUI Shin; TAKEMOTO Yasuhiko; ARIZONO Ikuo; TOMOHIRO Ryosuke; SUEHIRO Takatoshi
    Journal of Japan Industrial Management Association 公益社団法人 日本経営工学会 67 (4) 314 - 317 1342-2618 2017/01 [Refereed]
     
    <p>Negotiation procedures between a supplier and a retailer in a supply chain model including buyback contract have been studied in recent years. The negotiation procedures in the above studies have consisted of three successive steps: (i) show the necessity that the conclusion of the contract based on a set of contract parameters brings respective incentives to both of the supplier and retailer, (ii) present a mutual relationship between contract parameters of guaranteeing simultaneously optimalities of both of the supplier and retailer, and (iii) determine a unique combination of contract parameters using the Nash bargaining theory. Through successive steps (i)-(iii), some sets of contract parameters have been screened step by step, and eventually, an optimal set of contract parameters has been uniquely decided in step (iii) as a bargaining solution. However, the mathematical significance of respective conditions derived in steps (i) and (ii) for the bargaining solution of step (iii) has not been fully explained. Therefore, we reconsider respective roles of steps (i) and (ii) in the negotiation procedure based on a supply chain model including buyback contract. Then, we confirm the usefulness of the negotiation procedure consisting of three successive steps in the preceding studies.</p>
  • Reliability Analysis of 2-Component Standby Redundant System with Priority under Limited Information
    Oigawa, S; Arizono, I; Tomohiro, R; Takemoto, Y
    Proceedings of 17th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2016) 2016/12 [Refereed]
  • Tsurui, S; Takemoto, Y; Arizono, I; Tomohiro, R
    Proceedings of 17th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2016), Inderscience Publishers 3 (1) 34 - 34 2052-868X 2016/12 [Refereed]
  • Statistical Mechanics Model for M/M/s Queueing System with Balking
    Tamura, K; Arizono, I; Takemoto, Y
    Proceedings of 17th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2016) 2016/12 [Refereed]
  • A Study of Method for Tracing State Transition on Time Series of Process Variance
    Takemoto, Y; Arizono, I
    Proceedings of 17th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2016) 2016/12 [Refereed]
  • Ryosuke Tomohiro; Ikuo Arizono; Yasuhiko Takemoto
    International Journal of Production Research Informa UK Limited 54 (19) 5742 - 5760 0020-7543 2016/10 [Refereed]
  • Yoma Ishii; Ikuo Arizono; Ryosuke Tomohiro; Yasuhiko Takemoto
    Industrial Engineering and Management Systems Korean Institute of Industrial Engineers 15 (3) 231 - 238 2234-6473 2016/09 [Refereed]
     
    Traditional acceptance sampling plans have focused on the proportion of nonconforming items as an attribute criterion for quality. In today's modern quality management under high quality production environments, the reduction of the deviation from a target value in a quality characteristic has become the most important purpose. In consequence, various inspection plans for the purpose of reducing the deviation from the target value in the quality characteristic have been investigated. In this case, a concept of the quality loss evaluated by the deviation from the target value has been accepted as the variable evaluation criterion of quality. Further, some quality measures based on the quality loss have been devised e.g. the process loss and the process capability index. Then, as one of inspection plans based on the quality loss, the rigorous design procedure for the variable sampling plan having desired operating characteristics (VS-OC plan) indexed by the quality loss has been proposed by Yen and Chang in 2009. By the way, since the estimator of the quality loss obeys the non-central chi-square distribution, the rigorous design procedure for the VS-OC plan indexed by the quality loss is complicated. In particular, the rigorous design procedure for the VS-OC plan requires a large number of the repetitive and complicated numerical calculation about the non-central chi-square distribution. On the other hand, an approximate design procedure for the VS-OC plan has been proposed before the proposal of the above rigorous design procedure. The approximate design procedure for the VS-OC plan has been constructed by combining Patnaik approximation relating the non-central chi-square distribution to the central chi-square distribution and Wilson-Hilferty approximation relating the central chi-square distribution to the standard normal distribution. Then, the approximate design procedure has been devised as a convenient procedure without complicated and repetitive numerical calculations. In this study, through some comparisons between the rigorous and approximate design procedures, the applicability of the approximate design procedure has been confirmed.
  • Yasuhiko Takemoto; Ikuo Arizono
    Proceedings of 13th International Conference on Industrial Management (ICIM2016) CHINA AVIATION INDUSTRY PRESS 99 - 105 2016/09 [Refereed]
     
    Though the cost of establishing semiconductor equipment is expensive, equipment becomes obsolete quickly by new technology emerging in succession. Also, capacity of semiconductor equipment must be decided ahead of actual demand because the lead time necessary to prepare capacity is long. A typical type of contracts to mitigate a variety of risks in semiconductor industry is a capacity reservation contract in which a manufacturer of assembled products offers a semiconductor manufacturer the incentive to preparing the sufficient capacity. The capacity reservation contract has the following three contract parameters: (1) capacity, (2) reservation fee, (3) reservation quantity. At first, this study discusses some conditions about these three parameters to meet the requirement that the respective profits of the manufacturer of assembled products and semiconductor manufacturer under the capacity reservation contract exceed those under no capacity reservation contract. In this study, these conditions are called agreement conditions in the contract. Next, we consider the generalized Nash bargaining solution in order to decide the contract parameters of the capacity reservation contract. Then, the optimal contract parameters are discussed by taking into consideration the power balance between cooperative members in the generalized Nash bargaining solution.
  • Ikuo Arizono; Yusuke Okada; Ryosuke Tomohiro; Yasuhiko Takemoto
    The International Journal of Advanced Manufacturing Technology Springer Science and Business Media LLC 85 (9-12) 2413 - 2423 0268-3768 2016/08 [Refereed]
  • 竹本康彦; 有薗育生
    システム制御情報学会論文誌 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE) 29 (4) 192 - 194 1342-5668 2016/04 [Refereed]
  • Y. Takemoto; I. Arizono
    Journal of Risk and Reliability SAGE PUBLICATIONS LTD 230 (1) 67 - 74 1748-006X 2016/02 [Refereed]
     
    We consider a two-unit standby redundant system with priority. In the previous literature, the theoretical formulae for the MTTF of such a system have been obtained using the renewal theory in the condition that the probability distributions about failure and repair times have the respective explicit functions. However, it is sometimes impossible to calculate the MTTF of the system depending on the probability distributions in the case of using the theoretical formulae in the previous literature. In this paper, we consider the situation that the probability distributions about failure and repair times can be approximated as a mixed Erlang distribution. Under this situation, we develop a new approximation procedure for computing the MTTF of the system by combining some results of the Markov analysis based on Erlang distributions. Then, we investigate the validity of our proposed approximation by simulation.
  • 石井陽真; 友廣亮介; 有薗育生; 竹本康彦
    日本経営工学会論文誌 Japan Industrial Management Association 66 (4) 372 - 375 1342-2618 2016/01 [Refereed]
     
    Random numbers obeying beta distribution are utilized for simulation analyses of various stochastic models. However, the procedure for generating beta random numbers is limited depending on the values of the parameters. Therefore, in this paper, a unified procedure for generating beta random numbers independent of the values of the parameters is investigated using Wilson-Hilferty approximation and Stuarts proposition.
  • Comparison of Exact with Approximate Procedures for Designing Variable Sampling Plans Indexed by Quality Loss
    Ishii, Y; Arizono, I; Tomohiro, R; Takemoto, Y
    Proceedings of 16th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2015) 1067 - 1073 2015/12 [Refereed]
  • Variable Repetitive Group Sampling Plan with Screening for Permissible Average Outgoing Surplus Quality Loss Limit
    Okada, Y; Arizono, I; Tomohiro, R; Takemoto, Y
    Proceedings of 16th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2015) 1059 - 1066 2015/12 [Refereed]
  • A Study on Information Visualization of Changes in Process Mean and Dispersion on (x_bar,s) Control Chart
    Takemoto, Y; Arizono, I
    Proceedings of 16th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2015) 1053 - 1058 2015/12 [Refereed]
  • Proposal of Statistical-Mechanics Model for M/M/1 Queueing System with Balking
    Tamura, K; Arizono, I; Kato, W; Takemoto, Y
    Proceedings of 16th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2015) 571 - 578 2015/12 [Refereed]
  • 井上真吾; 有薗育生; 友廣亮介; 竹本康彦; 金川明弘
    日本経営工学会論文誌 Japan Industrial Management Association 66 (3) 218 - 229 1342-2618 2015/10 [Refereed]
     
    A SN ratio is famous as a criterion for parameter design using the Taguchi method. In recent years, it has been revealed that the statistical feature of the SN ratio is described by a doubly non-central F distribution. Accordingly, the characteristics of the doubly non-central F distribution are gaining attention again. However, it is extremely difficult to theoretically and exactly evaluate a percentile for the doubly non-central F distribution since its probability density function is very complicated. Therefore, approximation techniques for evaluating the percentile have been conventionally studied. One of them, a method for approximating the doubly non-central F distribution using central F distribution based on the first three approximate moments in the doubly non-central F distribution has been devised. Further, an evaluation of the doubly non-central F distribution percentile based on Cornish-Fisher expansion using those approximate values of first three moments has been proposed. In this study, we calculate the accurate values of moments in doubly non-central F distribution, and then propose a new method for evaluating the percentile of the distribution using the accurate values of the first two moments. Through some numerical simulations, the effectiveness of our new proposal in this study is confirmed. In addition, as an application of our proposal, the confidence interval of the SN ratio is evaluated.
  • 竹本康彦; 有薗育生
    日本経営工学会論文誌 Japan Industrial Management Association 66 (3) 240-248 (J-STAGE) - 248 1342-2618 2015/10 [Refereed]
     
    In general, the quality of items produced in a manufacturing process is not necessarily uniform, and it has stochastic variability. Control charts are basic tools for detecting a change in process conditions using the quality data with stochastic variability. When the assignable change in process conditions is detected by the control charts, identifying the time point of state change and searching for assignable causes are important issues in process management. In this study, first we develop the state transition tracking method for depicting the state transition and showing the change points using successive observed data. Then, we discuss a new procedure for monitoring the process conditions using the state transtion tracking method with the control charts.
  • 鎌田真; 市村匠; 竹本康彦; 重安哲也; 宇野健; 佐々木宣介
    県立広島大学経営情報学部論集 県立広島大学 (7) 179 - 190 1882-7985 2015/02
  • 有薗育生; 石井陽真; 友廣亮介; 井上真吾; 竹本康彦
    日本経営工学会論文誌 Japan Industrial Management Association 66 (3) 257-266 (J-STAGE) - 266 1342-2618 2015/01 [Refereed]
     
    In recent years, it has been indicated that the statistical feature of the SN ratio, which is famous as a criterion for parameter design using the Taguchi method, is described by a doubly non-central F distribution. Accordingly, the characteristics of the doubly non-central F distribution are gaining attention again. It should be noted that the cumulative distribution function of doubly non-central F distribution is shown based on the incomplete beta function or Gauss hypergeometric function. Since the computations for incomplete beta function and Gauss hypergeometric function are complex, approximations for evaluating the cumulative distribution function of the doubly non-central F distribution have been investigated. In this study, a new approximation for the cumulative distribution function of the doubly non-central F distribution is proposed. Through some numerical validation, the features of the proposed approximation are addressed.
  • Shin Kamada; Takumi Ichimura; Tetsuya Shigeyasu; Yasuhiko Takemoto
    SpringerPlus Springer Science and Business Media LLC 3 (1) 761 - 761 2193-1801 2014/12 [Refereed]
  • Reorder Point Determination Considering Customer Service Constraint under Limited Demand Information
    Takemoto, Y; Arizono, I
    Proceedings of 15th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2014) 1762 - 1768 2014/10 [Refereed]
  • Sequential Sampling Plan on Operating Characteristics Indexed by Quality Loss
    Tomohiro, R; Arizono, I; Takemoto, Y
    Proceedings of 15th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2014) 137 - 144 2014/10 [Refereed]
  • A Study on Evaluation of MTTF in 2-Unit Standby Redundant System with Priority
    Takemoto, Y; Arizono, I
    Proceedings of 6th Asia-Pacific International Symposium on Advanced Reliability and Maintenance Modeling (APARM 2014) 442 - 449 2014/08 [Refereed]
  • 有薗育生; 友廣亮介; 浅原昴範; 竹本康彦
    日本経営工学会論文誌 Japan Industrial Management Association 65 (2) 61 - 69 1342-2618 2014/07 [Refereed]
     
    Probability inequalities are used as a means to evaluate the upper bounds of upper probability for an average of some random variables based on finite stochastic properties, excluding the probability distribution functions of respective random variables. Note that in the case of applying the probability inequality, it is not necessary for the population of each random variable to be identical. Of the existing probability inequalities, Hoeffding probability inequality is highly regarded as an excellent probability inequality from the viewpoint of performance. Hoeffding probability inequality evaluates the upper bounds of upper probability for an average of some random variables based on limited stochastic properties such as expectation, variance and codomain in each random variable. However, we consider that there is a room to improve the performance of Hoeffding probability inequality. In this study, we demonstrate a technique for improving the performance of Hoeffding probability inequality in the case that the population of each random variable is not always identical.
  • 有薗育生; 西川裕馬; 加藤稚菜; 竹本康彦
    日本経営工学会論文誌 Japan Industrial Management Association 65 (2) 110 - 113 1342-2618 2014/07 [Refereed]
     
    The continuous-review (<i>Q</i>, <i>r</i>) inventory model for simultaneously determining economic order quantity and economic reorder point has been considered. In this paper, we investigate an improvement in the basic continuous-review (<i>Q</i>, <i>r</i>) inventory model. Further, an additional procedure to obtain a feasible solution based on the continuous-review (<i>Q</i>, <i>r</i>) inventory model is proposed.
  • Ikuo Arizono; Takuma Miyazaki; Yasuhiko Takemoto
    International Journal of Production Research Informa UK Limited 52 (2) 405 - 418 0020-7543 2014/01 [Refereed]
  • 友廣亮介; 有薗育生; 竹本康彦
    日本経営工学会論文誌 日本経営工学会 64 (4) 519 - 529 1342-2618 2014/01 [Refereed]
  • Interpretation of Out-of-Control Condition in Hotelling’s T2 Control Chart Using AIC
    Takemoto, Y; Arizono, I
    Proceedings of 14th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2013) 2013/12 [Refereed]
  • Design of Variable Repetitive Group Sampling Plan on Operating Characteristics Indexed by Quality Loss
    Tomohiro, R; Arizono, I; Takemoto, Y
    Proceedings of 14th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2013) 2013/12 [Refereed]
  • 有薗育生; 竹本康彦
    Synthesiology 産業技術総合研究所 6 (3) 140 - 151 1882-6229 2013/08 [Refereed]
     
    Japan has to urgently build a new system for securing electric power supply including renewable energy and for saving electric power. The electricity demand and the electricity supply based on renewable energy are influenced by the weather. Thermal power generation may also be affected by equipment failure. Therefore, plotting of a plan is required to avoid electric power shortage under inaccurate prediction for supply and demand of electricity. In this article, we propose a probability evaluation system to avoid electricity shortage. We also propose a method for setting the electricity saving rate to avoid electricity shortage while maintaining the present level of electricity shortage occurrence risk.
  • Yasuhiko Takemoto; Rumi Tanaka; Ikuo Arizono
    2013 IEEE 6th International Workshop on Computational Intelligence and Applications, IWCIA 2013 - Proceedings 39 - 44 2013/07 [Refereed]
     
    The control chart is a primary tool of judging whether a manufacturing process is in-control or not. Especially, the T2 control chart is known as a multivariate control chart that monitors a mean vector of several related quality characteristics. It is an important issue to identify which quality characteristics are responsible for out-of-control signal when a multivariate control chart signals. This paper considers a method of identifying quality characteristics responsible for out-of-control signal on operating the T2 control chart. © 2013 IEEE.
  • Discrimination of Out-of-Control Condition Using AIC in (x_bar, s) Control Chart
    Takemoto, Y; Arizono, I; Satoh, T
    Industrial Engineering and Management Systems: An International Journal 12 (2) 112 - 117 2013/06 [Refereed]
  • TAKEMOTO Yasuhiko; ARIZONO Ikuo
    Innovation and Supply Chain Management Japan Management Training Center 7 (2) 52 - 57 2187-0969 2013/06 [Refereed]
     
    In Japan, books and magazines have been distributed under the resale price maintenance and consignment sale systems. At present, the return rate of books and magazines has reached approximately 40 percent of the quantity of publications under the systems mentioned above. This is a severe problem from the viewpoints of both business and environment. For the purpose to solve this problem, a new sale system where wholesale price is reasonable while buyback price is inexpensive has been programmed and practiced. The wholesale and buyback prices are important contract parameters in the transaction program between publisher and bookstore. In this paper, the publishing supply chain consisting of a publisher and a bookstore is formulated as a mathematical model. Then, we have developed a new approach to solve the collaborative sale contract problem with wholesale and buyback prices as contract parameters.
  • ARIZONO IKUO; TAKEMOTO YASUHIKO; TSUJIWAKI YUICHI
    日本経営工学会論文誌 Japan Industrial Management Association 64 (1) 63 - 74 1342-2618 2013/04 [Refereed]
     
    The publications of books, magazines, music compact discs and newspapers in Japan are traded under the resale price maintenance and consignment sale systems. By these systems, the retail price is set uniformly nationwide, and dead stock is repurchased with the same price as the wholesale price. Therefore, it has not been required that bookstores in Japan actively develop an aggressive sale policy. On the other hand, a main policy of publishing companies is to deliver a large number of books in order to secure sales space in bookstores. As a consequence, in recent years, the returned goods rate of books has reached approximately 40 percent of the quantity of publications. This fact is getting a serious problem on management and environment. Under such a situation, a new sales system is considered where the wholesale price is lowered while cutting the buyback price is considered. In this case, both the wholesale price and buyback price are important contract parameters, and should be agreed on appropriately between the publishing company and bookstore. In this article, the supply chain contract problem between bookstore and publishing company is formulated. In particular, we assume that an accurate demand distribution of books is unknown from the reason why book has long product lifecycle and uniqueness. Accordingly, we apply the distribution free approach to solve this problem by using the limited information on mean and variance of demand. Then, a new decision procedure for contract parameters such as wholesale price and buyback price is discussed and suggested using the conventional coordination approach and game theory.
  • Ikuo Arizono; Yasuhiko Takemoto
    Synthesiology- English edition Nat. Inst. of Adv. Industrial Science and Technology (AIST) 6 (3) 137 - 146 1883-0978 2013 [Refereed]
     
    Japan has to urgently build a new system for securing electric power supply including renewable energy and for saving electric power. The electricity demand and the electricity supply based on renewable energy are influenced by the weather. Thermal power generation may also be affected by equipment failure. Therefore, plotting of a plan is required to avoid electric power shortage under inaccurate prediction for supply and demand of electricity. In this article, we propose a probability evaluation system to avoid electricity shortage. We also propose a method for setting the electricity saving rate to avoid electricity shortage while maintaining the present level of electricity shortage occurrence risk.
  • Arizono. I; Takemoto, Y
    Synthesiology English edition National Institute of Advanced Industrial Science and Technology 6 (3) 137 - 146 1883-0978 2013 [Refereed]
     
    Japan has to urgently build a new system for securing electric power supply including renewable energy and for saving electric power. The electricity demand and the electricity supply based on renewable energy are influenced by the weather. Thermal power generation may also be affected by equipment failure. Therefore, plotting of a plan is required to avoid electric power shortage under inaccurate prediction for supply and demand of electricity. In this article, we propose a probability evaluation system to avoid electricity shortage. We also propose a method for setting the electricity saving rate to avoid electricity shortage while maintaining the present level of electricity shortage occurrence risk.
  • Discrimination of Out-of-Control Condition Using AIC in (overline_x,s) Control Chart
    Takemoto, Y; Arizono, I
    Proceedings of 13th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2012) 984 - 990 2012/12 [Refereed]
  • Yasuhiko Takemoto; Ikuo Arizono
    The International Journal of Advanced Manufacturing Technology Springer Science and Business Media LLC 63 (1-4) 349 - 358 0268-3768 2012/11 [Refereed]
  • A Solution of Contract Problem in Book Trade Supply Chain Systems Based on Distribution Free Approach
    Arizono, I; Takemoto, Y
    Proceedings of the Hamburg International Conference of Logistics 2012 (HICL 2012) 75 - 87 2012/09 [Refereed]
  • TAKEMOTO YASUHIKO; SATO MOTOKI; ARIZONO IKUO
    日本経営工学会論文誌 63 (2) 76 - 83 1342-2618 2012/07 [Refereed]
  • 小川仁士; 竹本康彦; 佐々木宣介; 生田顯
    県立広島大学経営情報学部論集 県立広島大学 0 (4) 61 - 69 1882-7985 2012/02
  • ARIZONO IKUO; TAKEMOTO YASUHIKO
    日本経営工学会論文誌 Japan Industrial Management Association 62 (5) 230 - 238 1342-2618 2011/12 [Refereed]
     
    The quality of lots has sometimes been evaluated based on attribute properties such as the proportion or number of non-conforming items in the lot. There are two kinds of attribute sampling inspection plans with screening, called lot tolerance percent defective (LTPD) inspection and average outgoing quality limit (AOQL) inspection. These sampling inspection schemes have been designed in order to minimize the average total inspection (ATI), which means the expectation of number of samples to be inspected in the case of acceptance and number of samples inspected in the case that the lot is rejected. Taguchi proposed a concept of quality loss as a measure to evaluate the quality of items based on variable properties instead of attribute qualities such as the proportion of non-conforming items. This variable quality evaluation measure is known as "Taguchi's quality loss." Arizono et al. proposed acceptance sampling plans based on operating characteristics from the viewpoint of ensuring Taguchi's quality loss. Furthermore, Takemoto and Arizono proposed variable sampling inspection plans with screening for the purpose of ensuring the upper limit of maximum expected surplus loss after inspection indexed by Taguchi's quality loss. However, in the variable sampling inspection plans with screening considered in the above articles, minimizing the ATI in the screening sampling scheme has not been considered. In this article, we present design procedures for new variable sampling inspection plans with screening indexed by Taguchi's quality loss for the purpose of minimizing the ATI in conformity with conventional LTPD and AOQL attribute sampling inspection plans with screening.
  • Proposal of Reorder Point;Satisfying Allowable Shortage Rate under;Limited Dema;d;Information
    Takemoto, Y; Arizono, I
    Proceedings of 21th International Conference on Production Research (ICPR2011) 2011/08
  • Design Procedures for Variable Sampling Inspection Plans with Screening Indexed;by Taguchi’s;Quality Loss under Consideration of Minimizing Average Total Inspection
    Arizono, I; Takemoto, Y
    Proceedings of 21th International Conference on Production Research (ICPR2011) 2011/08
  • TAKEMOTO YASUHIKO; IWAMOTO FUMIE; ARIZONO IKUO
    日本経営工学会論文誌 Japan Industrial Management Association 62 (1) 21 - 24 1342-2618 2011/04 [Refereed]
     
    The conventional reorder point system has been studied by many researchers, and is still an important issue in inventory management. In the continuous review system, the reorder point is set as an inventory level so that the shortage rate during the procurement lead time becomes less than or equal to the specified allowable level. The conventional design of the reorder point is based on the assumption that demand follows a normal distribution. However, this assumption is not always appropriate. In this study, the design of the reorder point using the limited demand information is proposed.
  • 佐々木 宣介; 小川 仁士; 竹本 康彦; 陳 春祥; 宇野 健
    Journal of the Faculty of Management and Information Systems, Prefectural University of Hiroshima 県立広島大学 (3) 239 - 243 1882-7985 2011/02
  • New approach to Identifying Assignable Quality Characteristics in 2 Dimensional Hotelling T2 Control Chart
    Takemoto, Y; Arizono, I
    Proceedings of 11th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2010) 2010/12 [Refereed]
  • 竹本康彦; 矢後諒智; 有薗育生
    システム制御情報学会論文誌 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE) 23 (11) 274 - 276 1342-5668 2010/11 [Refereed]
  • 佐々木 宣介; 小川 仁士; 竹本 康彦
    Journal of the Faculty of Management and Information Systems, Prefectural University of Hiroshima 県立広島大学 (2) 65 - 68 1882-7985 2010/02 
    本研究は，高大連携公開講座を念頭において経営情報学科が対象とする経営情報分野の教材開発を行い，その上で，教材をWeb上で公開するe-leamingシステムの構築と運用を行うものである。これまでに教材公開用サーバの設置および，試験的な教材コンテンツの開発を行った。教材コンテンツは現時点で6つの教材を開発し，公開または公開直前の状況である。今後は，教材コンテンツの改訂・追加の他に，開発した教材を公開講座と連携して活用することなどを計画している。
  • 小川 仁士; 佐々木 宣介; 肖 業貴; 宇野 健; 竹本 康彦
    Journal of the Faculty of Management and Information Systems, Prefectural University of Hiroshima 県立広島大学 (2) 89 - 97 1882-7985 2010/02 
    本稿では，経営情報学科における情報処理技術者試験の受験推進および合格支援の取組みと実績について報告する。まず，試験の概要と本学科の人材育成目標との関連を明確にする。次に，受験推進および合格支援のために行ってきた各取組みについて整理する。さらに，受験状況ならびに合格状況を示し，今後の課題についても明らかにする。
  • TAKEMOTO YASUHIKO; ARIZONO IKUO
    日本経営工学会論文誌 60 (5) 249 - 258 1342-2618 2009/12 [Refereed]
  • Change Point Estimation of Process Mean in Process Continuous Change Model
    Takemoto, Y; Arizono, I
    Proceedings of 10th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2009) 2586 - 2591 2009/12 [Refereed]
  • 川崎雅也; 竹本康彦; 上野信行; 有薗育生
    システム制御情報学会論文誌 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE) 22 (11) 396 - 398 1342-5668 2009/11 [Refereed]
  • Estimation of Change Point in Process State on CUSUM (x_bar,s) Control Chart
    Takemoto, Y; Arizono, I
    Industrial Engineering and Management Systems: An International Journal 8 (3) 139 - 147 2009/09 [Refereed]
  • Variable Sampling Inspection with Screening When Lot Quality Follows Mixed Normal Distribution
    Suzuki, Y; Takemoto, Y; Arizono, I
    Industrial Engineering and Management Systems: An International Journal 8 (3) 131 - 138 2009/09 [Refereed]
  • 竹本康彦; 有薗育生
    システム制御情報学会論文誌 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE) 22 (8) 311 - 313 1342-5668 2009/08 [Refereed]
  • Maiko Morita; Ikuo Arizono; Ippei Nakase; Yasuhiko Takemoto
    The International Journal of Advanced Manufacturing Technology Springer Science and Business Media LLC 43 (3-4) 304 - 311 0268-3768 2009/07 [Refereed]
  • The Impact of Nonconforming Items on ( s, S ) Inventory Model with Customer Reservation and Cancellation
    Takemoto, Y; Arizono, I
    Industrial Engineering and Management Systems: An International Journal 8 (2) 72 - 79 2009/06 [Refereed]
  • MORITA Maiko; NAKASE Ippei; ARIZONO Ikuo; TAKEMOTO Yasuhiko
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 60 (2) 77 - 86 1342-2618 2009/06 [Refereed]
     
    Taguchi has presented the concept of quality loss as an evaluation measure of the quality of items based on variable properties. Recently, Takemoto and Arizono, and Morita et al. have proposed variable sampling inspection with screening for the purpose of assuring the upper limit of maximum expected surplus loss after inspection. In this inspection scheme, it is assumed that the product lot consists of only items manufactured through a single production line and the lot quality characteristics follow a normal distribution. In previous literature regarding inspection schemes, it has been com...
  • Maiko Morita; Ikuo Arizono; Yasuhiko Takemoto
    The International Journal of Advanced Manufacturing Technology Springer Science and Business Media LLC 41 (9-10) 908 - 915 0268-3768 2009/04 [Refereed]
  • Analysis of R out of N standby redundant system with emergency repair man
    Takemoto,Y; Arizono, I
    Asia Pacific Journal of Industrial Management 2 (1) 7 - 14 2009 [Refereed]
  • Variable Sampling Inspection with Screening When Lot Quality Follows Mixed Normal Distribution
    Suzuki, Y; Morita, M; Nakase, I; Takemoto, Y; Arizono, I
    Proceedings of 9th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2008) 769 - 776 2008/12 [Refereed]
  • Estimation of Change Point in Process State on CUSUM (x_bar,s) Control Chart
    Takemoto, Y; Arizono, I
    Proceedings of 9th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2008) 501 - 509 2008/12 [Refereed]
  • Proposal of Approximation Analysis Method for GI/G/1 Queueing System
    Kou, F; Nakase, I; Arizono, I; Takemoto, Y
    Industrial Engineering and Management Systems: An International Journal 7 (2) 143 - 149 2008/09 [Refereed]
  • Ikuo Arizono; Yuuki Kawamura; Yasuhiko Takemoto
    European Journal of Operational Research Elsevier BV 189 (2) 570 - 574 0377-2217 2008/09 [Refereed]
  • Takemoto, Y; Arizono, I
    Proceedings of 9th International Conference on Industrial Management (ICIM2008) CHINA AVIATION INDUSTRY PRESS 24 - 30 2008/09 [Refereed]
     
    An R out of N standby redundant system consists of N components and operates if at least R components are functioning. The increase in the number of failed components leads the system to a breakdown. In order to avoid the breakdown of the system, it may be natural that a repair man is temporarily added into the system when the number of failures in the components becomes large. In this paper, we consider an R out of N standby redundant system with an emergency repair man. In the analysis, we adopt the graph technique for obtaining the system availability and then show its effectiveness in comparison with the traditional approach. Further, the economical operation of the emergency repair man and the economical design of the system are investigated.
  • MORITA Maiko; ARIZONO Ikuo; NAKASE Ippei; TAKEMOTO Yasuhiko
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 59 (2) 128 - 136 1342-2618 2008/06 [Refereed]
     
    Process capability indices are widely used to provide evaluation measures of process potential and performance. Especially, the process capability index C_<pm>, which is defined by the tolerance and deviation from the target, is called the Taguchi index. Boyles investigated the statistical characteristics of the C_<pm>, estimator, and also proposed a methodology for the C_<pm> control chart. Needless to say, since the process capability index C_<pm> is based on the concept of the quality loss introduced by Taguchi, it basically relates to the concept of cost performance. In this article, we consider the economical operation of the C_<pm> control chart in conformity with the expected total operation cost function based on the sampling cost, the sample cost and the surplus loss by means of ignoring the out-of-control state. Then, the economical operation of the C_<pm> control chart minimizing the total operation cost is investigated.
  • Investigation into the Influence of Process Data from Initial In-control State on Some CUSUM (x_bar,s) Control Charts
    Takemoto, Y; Arizono, I
    Proceedings of 8th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2007) 2007/12 [Refereed]
  • KINOSHITA Masao; NAKASE Ippei; ARIZONO Ikuo; TAKEMOTO Yasuhiko
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 58 (2) 97 - 105 1342-2618 2007/06 [Refereed]
     
    In today's business environment, we are faced with some problems from the viewpoint of ecology; one important problem being the reuse of used products. Used products are generally collected and stored as reusable resources. The remanufacturing production system meets the demand by remanufacturing products utilizing reusable resources in addition to the production of new products. In this case, the flow of reusable resources is called reverse-logistics in contrast to the flow of demand. Naturally, the optimal production policy of the remanufacturing production system with reverse-logistics s...
  • Morita; M. Arizono, I; Takemoto, Y
    Proceedings of 18th Production and Operations Management Society Conference (POMS2007) 2007/05
  • Production Allocation;Problem with Penalty;by Tardiness of Delivery under Make-to-Order Environment
    Takemoto, Y; Arizono, I
    Proceedings of 18th Production and Operations Management Society Conference (POMS2007) 2007/05
  • Proposal of Approximation Analysis Method for GI/G/1 Queueing System
    Kong; F. Nakase; I. Arizono, I; Takemoto, Y
    Proceedings of 7th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2006) 2222 - 2228 2006/12 [Refereed]
  • The Impact of Mixing in of Nonconforming Items on ( s, S ) Inventory Model with Customer Order Reservation and Cancellation
    Takemoto, Y; Arizono, I
    Proceedings of 7th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2006) 1388 - 1395 2006/12 [Refereed]
  • System Availability Analysis with Two Failure Modes of Random Failure and Wear-out Failure
    Nakase, I. Arizono; I. Takamori, K; Takemoto, Y
    Proceedings of 7th Asian Pacific Industrial Engineering and Management Systems Conference (APIEMS2006) 1115 - 1123 2006/12 [Refereed]
  • Analysis and Optimal Production Allocation Policy of Make-to-Order Manufacturing System with Reverse Logistics
    Nakase, I. Kinoshita; M. Arizono, I; Takemoto, Y
    Proceedings of 1st International Workshop on Institutional view of Supply Chain Management (IWACM2006) 49 - 61 2006/11
  • Influence of Information about Proportion of Nonconforming Items on Inventory Policy
    Takemoto, Y; Arizono, I
    Proceedings of 1st International Workshop on Institutional view of Supply Chain Management (IWSCM2006) 238 - 247 2006/11
  • TAKEMOTO YASUHIKO; ARIZONO IKUO
    日本経営工学会論文誌 社団法人日本経営工学会 57 (1) 51 - 58 1342-2618 2006/04 [Refereed]
     
    The quality of a lot has sometimes been evaluated based on attribute properties such as the percentage of nonconforming items or the number of nonconforming items in the lot. On the other hand, Taguchi has proposed the concept of "quality loss" as the evaluation measure of quality of items based on variable properties. Concretely, Taguchi's loss function has been defined as a quadratic function based on the departure from the target value of an item. Recently, from the viewpoint of assuring the quality loss based on Taguchi's loss function, a single sampling inspection plan based on operating characteristics has been proposed. This sampling procedure has been designed for the purpose of assuring both the specified producer's risk for the lot with an acceptable quality loss limit and the consumer's risk for the lot with a rejectable quality loss limit. However, the disposition of the rejected lot isn't specifically declared in the sampling inspection plan mentioned above. While, there is a sampling inspection plan with screening by attribute in which the rejected lot in the sampling inspection is thoroughly inspected and nonconforming items are exchanged for conforming items or repaired. In this sampling procedure, the sampling plans have been designed for the purpose of assuring the percentage of nonconforming items in every lot and the upper limit of the average outgoing quality level as the average outgoing percentage of nonconforming items. In this article, the quality evaluation based on Taguchi's loss function is adopted instead of the quality evaluation based on the percentage of nonconforming items as lot quality. Then, we propose a single sampling inspection plan with screening by variable indexed by Taguchi's loss function for the purpose of assuring the upper limit of the maximum expected surplus loss.
  • TAKEMOTO Yasuhiko; ARIZONO Ikuo
    Japanese journal of applied statistics. 応用統計学会 34 (2) 99 - 120 0285-0370 2005/12 [Refereed]
     
    In general, a process starts in an in-control state and then some assignable causes change the process state to be out-of-control. It is worthwhile to utilize serial data in addition to the current data in order to monitor the process state, for which the CUSUM and EWMA control charts are useful. Performance of the CUSUM and EWMA control charts has been investigated under the condition that the process starts in an out-of-control state. However, as mentioned above, a process usually starts in an in-control state. In this paper, we present CUSUM and EWMA control charts based on the Kullback-Leibler information. Then, and investigate their performance under the condition that some assignable causes change the process from the in-control state to an out-of-control state. Because it is also important to discriminate the switchover time of the process state, we propose a discrimination procedure for the process state switchover time based on the information criterion.
  • TAKEMOTO Yasuhiko; YAMAGUCHI Tetsuji; ARIZONO Ikuo
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 56 (4) 265 - 273 1342-2618 2005/10 [Refereed]
     
    We have contrived these control charts in order to detect the out-of-control state of the process. The assignable causes of the out-of-control state consist of the incompleteness of materials supplied from the previous process or in the process operation at the present process. In quality management, it is important to detect the out-of-control state and to remove the factor by which it is caused. Although conventional control charts, in which the state of the process is judged only on output data of products from the present process, are useful statistical tools for detecting the out-of-co...
  • TAKAMORI Kayoko; NAKASE Ippei; TAKEMOTO Yasuhiko; ARIZONO Ikuo
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 56 (2) 101 - 108 1342-2618 2005/06 [Refereed]
     
    Recently, Cao et al. considered the mean availability of a system that has multiple failure modes. Thus led to the creation of a formula for the mean availability of systems with multiple failure modes (i.e., random and wear-out failure modes). The formula of the mean availability derived by Cao et al. requires an exact distribution function of failure-time distribution that wear-out failures follow. However, there are often cases where information such as average and standard deviation are only known, and the exact distribution function isn't specified. In this article, under limited infor...
  • Yasuhiko Takemoto; Ikuo Arizono
    The International Journal of Advanced Manufacturing Technology Springer Science and Business Media LLC 25 (11-12) 1205 - 1210 0268-3768 2005/06 [Refereed]
  • NAKASE Ippei; TAKEMOTO Yasuhiko; ARIZONO Ikuo
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 56 (1) 38 - 45 1342-2618 2005/04 [Refereed]
     
    In recent years, build-to-order manufacturing systems have been increasingly adopted, because of their ability to meet the various needs of customers and progress in Internet businesses. Therefore, it is necessary to construct a build-to-order manufacturing system that is capable of reducing the inventory cost of components and opportunity loss in busy periods and decrease the operating cost of manufacturing facilities and wages for employees in idle periods. Therefore, we consider a build-to-order manufacturing system with a standby facility in addition to a permanent facility, and investi...
  • TAKEMOTO YASUHIKO; ARIZONO IKUO
    システム制御情報学会論文誌 THE INSTITUTE OF SYSTEMS, CONTROL AND INFORMATION ENGINEERS (ISCIE) 18 (3) 100 - 107 1342-5668 2005/03 [Refereed]
     
    Manufacturing systems are classified into make-to-stock (MTS) systems and make-to-order (MTO) systems. In particular, the MTO manufacturing systems have been applied to many enterprises in order to react to consumer's uncertain demands and various requirements. Until now, in the studies for the order splitting policy to some original equipment manufacturers (OEMs) under the MTO manufacturing systems, the expectation of the lead time has been mainly considered. In general, the lead-time has the variability because of the fluctuations of the processing time and the demand. Therefore, when the optimal operation of the MTO manufacturing systems is investigated, we should consider the possibility of the delay for the appointed date of delivery of products. In this study, taking the penalty of the delay of delivery into consideration, we investigate the order splitting policy to two OEMs having the difference in the processing cost and the capacity.
  • Analysis of Build-to-Order Manufacturing System with Standby Facilities
    Nakase, I. Takemoto, Y. and Arizono, I.
    Proceedings of 8th International Conference on Manufacturing and Management (ICMM2004) 770 - 777 2004/12
  • KAWAMURA Yuuki; TAKEMOTO Yasuhiko; ARIZONO Ikuo
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 55 (5) 302 - 307 1342-2618 2004/12 [Refereed]
     
    In traditional reliability tests for assuring the mean time to failure (MTTF) in Weibull distribution with shape and scale parameters, it is assumed that the change of lifetime is concerned with the scale parameter only. Then, Hisada et al. proposed a reliability test procedure for assuring MTTF while considering the influence of both shape and scale parameters. Their reliability test requires complete lifetime data, and the application of a censoring procedure for designing a reliability test for Weibull distribution that considers the influence of both shape and scale parameters has not b...
  • TAKEMOTO YASUHIKO; ARIZONO IKUO
    日本経営工学会論文誌 社団法人日本経営工学会 55 (4) 189 - 196 1342-2618 2004/10 [Refereed]
     
    Recently, the rapid growth of data-acquisition technology and the use of online computers for process monitoring have led to an increased interest in the simultaneous surveillance of several related quality characteristics or process variables. In general, related quality characteristics are assumed to be distributed as multivariate normal random variables. As a result, the multivariate control chart for the mean vector has been studied extensively in many works. Popularly, in the case that the quality characteristics are distributed as univariate normal random variables, the mean and variance are simultaneously treated as the objectives of surveillance. From this point, in the case that the quality characteristics are distributed as multivariate normal random variables, the mean vector and variance-covariance matrix should be simultaneously treated as the objectives of surveillance. Kanagawa et al. have proposed a (x^^-, s) simultaneous control chart that enables the user to monitor both changes in the mean and variance in a process simultaneously based on Kullback-Leibler information when the quality characteristics are distributed as univariate normal random variables. In this study, as an extension of the (x^^-, s) simultaneous control chart, we propose a multivariate (X^^-, S) simultaneous control chart that enables the user to monitor both changes in the mean vector and variance-covariance matrix simultaneously. Further, the evaluation of the power for the proposed multivariate (X^^-, S) simultaneous control chart is also considered.
  • TAKEMOTO YASUHIKO; NAKASE IPPEI; ARIZONO IKUO
    電子情報通信学会論文誌 A 一般社団法人電子情報通信学会 J87-A (8) 1133 - 1140 0913-5707 2004/08 [Refereed]
     
    本研究では,k-out-of-n:G reoairable systemについて考察する.このk-out-of-n:G renairable systemに関する一般的な考察では,修理工がシステムの大きさに対応するだけ用意されており,かつそれぞれが同一の修復能力をもちシステム内に常駐している状況が扱われてきた.これに対して,本研究では常駐の修理工数が制限されており,この修理工と異なる修復能力をもつ緊急修理工が故障ユニット数の増減に応じて投入及び回収される状況を想定する.この状況のもとで,緊急修理工の投入及び回収の方策に対応するシステムアベイラビリティを評価する.加えて,緊急修理工の投入-回収に関する経済的方策についても言及する.
  • Proposal of Control Charts for Extreme Value Distribution Based on S_u Approximation
    Kawamura, Y; Takemoto, Y; Arizono, I
    Proceedings of 8th International Conference on Manufacturing and Management (ICMM2004) 430-437 2004
  • Statistical Process Monitoring Procedure Based on Both Input and Output Properties for Specifying Assignable Cause of Out-of-Control State
    Takemoto, Y; Arizono, I
    Proceedings of 8th International Conference on Manufacturing and Management (ICMM2004) 454 - 461 2004
  • TAKEMOTO Yasuhiko; KAWAMURA Yuuki; YAMAGUCHI Tetsuji; ARIZONO Ikuo
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 Vol. 54 No. 4 pp. 253-259 (4) 253 - 259 1342-2618 2003/10 [Refereed]
     
    It is generally assumed that data are distributed as normal random variables. Therefore, the data are analyzed based on normal distribution. However, in practice, there are many situations that data are distributed as non-normal random variables. The data for material destruction phenomenon is one example. In this case, the data for destruction is explained clearer by the extreme value distribution based on the weakest link theory rather than normal distribution. It is illustrated that the various data based on the weakest link theory, such as data for the strength of industrial materials, ...
  • Y Takemoto; Arizono, I
    Proceedings of 49th Annual Reliability and Maintainability Symposium (RAMS2003) I E E E 111 - 116 0149-144X 2003/06 [Refereed]
     
    The accelerated life tests can obtain information on lifetime characteristics of products quickly. Then, the products can be submitted to higher levels of stress in various ways such as constant, step, and progress stress. In a constant-stress model, products are run under a constant level of stress until all products fail or a time limit is reached. A step-stress model allows the stress setting to be changed at a prescribed time or upon the occurrence of a fixed number of failures. In a progress-stress model, the stress is continuously increased over time. Until now, under the assumption of the functional relationship between the parameters of lifetime distribution and applied stress, there are many studies about parameter estimation using data obtained from an accelerated life test. In this study, instead of the parameter estimate problem, we consider a new design procedure of accelerated life tests based on the simple-step-stress model for assuring the mean time to failure (MTTF) at usual stress with specified producer and consumer risks under the condition that the parameters of the lifetime distribution at two stress levels are provided. The practical usage of the proposed design procedure is illustrated through some numerical examples.
  • Yasuhiko Takemoto; Kyouko Watakabe; Ikuo Arizono
    International Journal of Production Research Informa UK Limited 41 (9) 1873 - 1886 0020-7543 2003/06 [Refereed]
  • Jun'ichi Kobayashi; I. Arizono; Y. Takemoto
    International Journal of Production Research Informa UK Limited 41 (6) 1115 - 1132 0020-7543 2003/04 [Refereed]
  • TAKEMOTO YASUHIKO; ARIZONO IKUO
    応用統計学 Japanese Society of Applied Statistics 31 (2) 141 - 162 0285-0370 2002/11 [Refereed]
     
    This article deals with the hypothesis test for the homogeneity of two normal populations. The likelihood ratio test is a usual method for such testing. In general theory, the asymptotic distribution of log-likelihood ratio statistics as testing statistics is well known under the null hypothesis, so we may design the test based on the asymptotic distribution. On one hand, the asymptotic distribution of log-likelihood ratio statistics is also considered under the alternative hypothesis. However, in the case that sample sizes are not so large, the asymptotic distributions are not so accurate under the arbitrary hypotheses. Recently, Arizono et al. have derived the cumulant generating function for the log-likelihood ratio statistics under the null hypothesis when the sample size is finite, and enabled to design accurately the null hypothesis test for homogeneity of two normal populations. However, the stochastic properties of log-likelihood ratio statistics under the alternative hypothesis and the power of testing have not been investigated in theory. Therefore, we consider the stochastic properties of log-likelihood ratio statistics under arbitrary hypotheses in this article. Concretely, the cumulant generating function for the log-likelihood ratio statistics and the cumulant of arbitrary order are derived under the arbitrary hypotheses when the sample size is finite. Further, by using the cumulants of log-likelihood ratio statistics derived in this article, we develop the approximation for the distribution of log-likelihood ratio statistics, and propose the theoretical evaluation of the power for the homogeneity hypothesis test.
  • INOUE Naooki; ARIZONO Ikuo; TAKEMOTO Yasuhiko
    Journal of Japan Industrial Management Association 社団法人日本経営工学会 53 (1) 18 - 25 1342-2618 2002/04 [Refereed]
     
    Accelerated life tests are frequency used to obtain information on life distribution of products quickly. The products can be submitted to higher level of stress in various ways such as constant, step, and progress stress. In a constant-stress test, products are run at some constant level of stress until all products fail or a time limit is reached. A step-stress test allows the stress setting to be changed at a prescribed time or upon the occurrence of a fixed number of failures. In a progress-stress test, the stress is continuously increased over time. Under the assumption of the function...
  • TAKEMOTO YASUHIKO; WATAKABE KYOKO; KOBAYASHI JUN'ICHI; ARIZONO IKUO
    日本経営工学会論文誌 社団法人日本経営工学会 52 (1) 30 - 36 1342-2618 2001/04 [Refereed]
     
    The cumulative sum control chart is known as a control chart sensitive to a slight change in lot quality characteristics. Further, in this control chart, the user can determine chart parameters according to the degree of change in quality characteristics which the user wants to detect. On the other hand, Kanagawa et al.have proposed the(x^^-, s)simultaneous control chart which enables the user to monitor both changes of the mean and the variance simultaneously for normally distributed characteristics. In this paper, we consider a cumulative sum(x^^-, s)simultaneous control chart in order to improve the control feature for a slight change in quality characteristics. In addition, the economical operation of the cumulative sum(x^^-, s)simultaneous control chart is also considered.

Books etc

  • Advanced Reliability and Maintenance Modeling VI
    Takemoto, Y; Arizono, I (ContributorA Study on Evaluation of MTTF in 2 Unit Standby Redundant System with Priority)McGraw Hill 2014
  • Pioneering Supply Chain Design – A Comprehensive Insight into Emerging Trend, Technologies and Applications
    Arizono, I; Takemoto, Y (A Solution of Contract Problem in Book Trade Supply Chain Systems Based on Distribution Free Approach, 75-87)Josef Eul Verlag 2012

Conference Activities & Talks

MISC

Industrial Property Rights

Awards & Honors

  • 2018/03 International Association of Engineers (IAENG) Best Paper Award
     Development of Reliability Function in 2-Component Standby Redundant System with Priority Based on Maximum Entropy Principle 
    受賞者: Mr. Ryosuke HIRATA;Prof. Ikuo ARIZONO;Mr. Ryosuke;TOMOHIRO;Mr. Satoshi OIGAWA;Dr. Yasuhiko;TAKEMOTO
  • 2017/05 Japan Industrial Management Association JIMA Distinguished Research Award
     Distinguish Researcher Award "Research on Interpretation of Abnormal Condition in Statistical Process Control Based on IE and OR Philosophy 
    受賞者: TAKEMOTO Yasuhiko
  • 2016/09 The 13th Int. Conf. on Industrial Management (ICIM2016) Excellent Paper Award
     Agreement Condition and Cooperative Bargaining in Capacity Reservation Contract for Semiconductor Industry 
    受賞者: Takemoto, Y;Arizono, I
  • 2009/05 Japan Industrial Management Association Promising Paper Award for Young Researcher
     不適合品による不確実性の在庫システムへの影響 JPN 
    受賞者: Yasuhiko TAKEMOTO
  • 2008/09 The 9th Int. Conf. on Industrial Management (ICIM 2008) Excellent Paper Award
     Analysis of R out of N standby redundant system with emergency repair man 
    受賞者: Takemoto, Y;Arizono, I
  • 2002/03 大阪府立大学大学院工学研究科 学業奨励賞
     JPN

Research Grants & Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2018/04 -2022/03 
    Author : Arizono Ikuo
     
    When making decisions about several problems in various systems, it is a realistic correspondence to make decisions based only on the limited information available. In order to make rational decisions, a scientific and systematic method for understanding the target system based on limited information is necessary. Considering this situation, this study discusses system analysis methods based on limited information in several systems, and decision-making methods based on the results of such analysis.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2017/04 -2022/03 
    Author : TAKEMOTO YASUHIKO
     
    Our research team in this project have focused on visualization, translating invisible perception to visible image, in production site and considered some practical methods for improving productivity through utilizing visualization in production management. We have, in particular, discussed various solutions through visualization for some problems with respect to quality in individual production process and between production processes. We have aimed at design and development of some practical methods based on data visualization integrating advanced statistical method and information and communication technology (ICT). As a result, several advanced statistical methods have been proposed and a prototype of the application have been designed and developed.
  • 次世代8K高精細フラットパネルの高歩留まり製造を実現する欠陥検査システムの実用化開発
    経済産業省：戦略的基盤技術高度化支援事業
    Date (from‐to) : 2015/04 -2018/03 
    Author : OHT株式会社
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2015/04 -2018/03 
    Author : ARIZONO Ikuo
     
    With the project called "Industry 4.0" that gives the idea of the next generation production system, efforts utilizing ICT at the production scenes are underway rapidly. In particular, efforts to analyze large amounts of data extracted from various devices in the factory connected by a network are central to that. In this research project, we considered the quality management systems based on data analysis based on the manufacturing environment in which ICT was developed. Concretely, we examined a methodology for linking data analysis with the concept of cost and visualizing waste and losses into perceivable form by human beings.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2014/04 -2018/03 
    Author : TAKEMOTO Yasuhiko
     
    In today’s business environment, conventional transaction systems and styles sometimes don’t function well from the change of market structure and advance in information and communication technology. This research project has considered transaction systems and styles to achieve rationalization and optimization of distribution systems in today’s supply chains. In particular, the transaction systems and styles can be considered supply chain contracts. In this research project, the transactions in some business scenes such as publishing business and semiconductor industry have been formulated as a mathematical model. Then, the mathematical models have been analyzed using the theory of game and mechanism design. Decision making strategy of contract parameters in the mathematical models has been researched and developed.
  • センサネットワーク技術の構築とこれを活用した機械学習アルゴリズムの開発
    財団法人サタケ技術振興財団：提案公募型研究助成
    Date (from‐to) : 2014/04 -2015/03 
    Author : 重安哲也; 竹本康彦; 市村匠
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2009 -2011 
    Author : TAKEMOTO Yasuhiko
     
    In this study, we have discussed an impact of product and service quality on supply chains. Especially, we have shown an aspect of ripple effects of quality issues on the supply chain. For the purpose of preventing the issues, the contract techniques have been introduced. The contract has realized a risk hedge and provided the good performance. At the same time, we have proposed an approach to optimization of contracts.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2008 -2010 
    Author : ARIZONO Ikuo; TAKEMOTO Yasuhiko
     
    Due to the progress of manufacturing technology, the proportion of nonconforming products in lots has been remarkably decreased in recent. The research and development on quality management system with the advanced data analysis technology has been required according to the progress of manufacturing technology. In our research, the elaborate quality criterion instead of the conventional quality criterion has been adopted, and some advanced data analysis techniques have been proposed. Then, next generation quality management system under high quality production environments has been researched and discussed.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2006 -2008 
    Author : TAKEMOTO Yasuhiko
     
    高度な技術に支えられている現代の社会生活において,複雑な製品やシステムにおける品質の欠陥は,ときとして社会に大きな損害と被害をもたらすことになる.このために,社会と技術の高度化が進むにつれて,社会と消費者に対する品質保証の活動が重要な意義を有する.本研究課題では,製造段階から出荷段階に至る一連の生産システム全体を管理の対象として捉え,一連の流れのもとで品質保証を実現するための科学的アプローチの開発に着手した.
  • 8th International Conference on Manufacturing & Managementへの参加・発表
    公益財団法人立石科学技術振興財団：国際交流（派遣）助成
    Date (from‐to) : 2004/12 -2004/12 
    Author : 竹本 康彦

Teaching Experience

  • Practice of programmingPractice of programming Kindai University
  • Industrial Management EngineeringIndustrial Management Engineering Kindai University
  • Management of MonozukuriManagement of Monozukuri Kindai University
  • Quality ManagementQuality Management Kindai University
  • Probability & StatisticsProbability & Statistics Kindai University
  • Experiments in PhysicsExperiments in Physics Kindai University

Social Contribution

  • 町内会・自治会加入状況改善のための活動の見える化と仕組みづくりに関する考察
    Date (from-to) : 2016/04/01-2017/03/31
    Role : Investigator
    Category : Investigation
    Sponser, Organizer, Publisher  : 平成28年県立広島大学度重点研究事業・地域課題解決研究
  • 地域力診断のための指標づくり
    Date (from-to) : 2015/04/01-2017/03/31
    Role : Investigator
    Category : Investigation
    Sponser, Organizer, Publisher  : 平成27年度県立広島大学地域戦略協働プロジェクト事業（広島市南区）
  • 旧宮島支所庁舎跡地新施設の利活用方策および利活用団体の調査事業
    Date (from-to) : 2014/04/01-2015/03/31
    Role : Investigator
    Category : Investigation
    Sponser, Organizer, Publisher  : 平成26年度県立広島大学地域戦略協働プロジェクト事業（廿日市市）

Other link

researchmap


Copyright © MEDIA FUSION Co.,Ltd. All rights reserved.