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研究生： 李宗哲
Lee, Zong-Zhe
論文名稱： 退化狀態下生產時間與備用元件最佳策略之研究
Joint Determination of the Production Run time and the Optimal Number of Standby Components in Deteriorating Production Processes
指導教授： 謝中奇
Hsieh, Chung-Chi
學位類別： 碩士
Master
系所名稱： 管理學院 - 工業管理科學系
Department of Industrial Management Science
論文出版年： 2002
畢業學年度： 90
語文別： 英文
論文頁數： 43
外文關鍵詞： EMQ, deterioration, standby
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    In the classical EMQ model, all items are assumed to be of perfect quality. Because
    this assumption is not practical in real production systems, recent studies focus
    on deteriorating production systems, in which defective items are incurred. In the
    past EMQ models, they have considered inspection intervals, maintenance strategies,
    machine breakdown and etc. respectively or jointly. In this study, we develop four
    EMQ models for a deteriorating standby production system consisting of a core production
    station with a key production component, a repair shop and a set of standby
    components. The key production component will shift from an in-control state to an
    out-of-control state during the production run, and some percentage of the items produced
    is defective. The deteriorating component will then be replaced by a standby
    component, if available; and if the replacement is made, all the items produced are
    of perfect quality until next deterioration occurs. Four EMQ models both with nonrepairable
    components and with repairable components are discussed. Our objective
    is to determine the optimal production cycle time and the optimal number of standby
    components for each EMQ model by minimizing the annual cost. Finally, numerical
    examples are provided to illustrate the optimal policies for these four EMQ models.

    ACKNOWLEDGEMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . iii LIST OF FIGURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi CHAPTER I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Objective . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 II. LITERATURE REVIEW . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 C lassical EMQModel . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Extended EMQModels . . . . . . . . . . . . . . . . . . . . . . 6 2.2.1 The EMQ Model with Imperfect Production Processes 7 2.2.2 EMQModels with Inspection Schedules . . . . . . . . 9 2.2.3 EMQModels withMaintenance . . . . . . . . . . . . 12 2.3 The Standby System . . . . . . . . . . . . . . . . . . . . . . . . 13 III. EMQ MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.1 EMQModels with Non-repairable C omponents . . . . . . . . . 18 3.1.1 Model 1 . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.1.2 Model 2 . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.1.3 Model 3 . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.2 EMQModel with Repairable C omponents . . . . . . . . . . . . 25 3.2.1 Model 4 . . . . . . . . . . . . . . . . . . . . . . . . . 26 IV. EXPERIMENTS AND RESULTS . . . . . . . . . . . . . . . . . 32 4.1 Illustrative Example forModel 1 . . . . . . . . . . . . . . . . . 32 4.2 Illustrative Example forModel 2 . . . . . . . . . . . . . . . . . 33 4.3 Illustrative Example forModel 3 . . . . . . . . . . . . . . . . . 36 4.4 Illustrative Example forModel 4 . . . . . . . . . . . . . . . . . 37 V. CONCLUSION AND FUTURE RESEARCH DIRECTIONS 40 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

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