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系統識別號 U0026-2007201720252900
論文名稱(中文) 以模擬最佳化求解自行車鏈條之CONWIP拉式系統設計
論文名稱(英文) The Use of Simulation Optimization in Solving the CONWIP Pull System Design Problem from Bicycle Chain Manufacturing
校院名稱 成功大學
系所名稱(中) 製造資訊與系統研究所
系所名稱(英) Institue of Manufacturing Information and Systems
學年度 105
學期 2
出版年 106
研究生(中文) 黃冠程
研究生(英文) Guan-Cheng Huang
學號 P96044061
學位類別 碩士
語文別 中文
論文頁數 92頁
口試委員 指導教授-楊大和
口試委員-連震杰
口試委員-洪郁修
召集委員-郭宜雍
中文關鍵字 CONWIP  系統模擬  精實生產  拉式系統  價值流圖 
英文關鍵字 CONWIP  Discrete-event simulation  Lean production  Pull system  Value stream mapping 
學科別分類
中文摘要 台灣為自行車王國,自行車零件製造業為台灣重要的產業,面臨著少量多樣的顧客需求,如此一來零件製造業者該如何減少庫存、降低生產時的浪費並且準時達交顧客需求成為一個值得深入探討的問題。許多企業傾向導入精實生產來降低生產成本與增加製造彈性以提升企業競爭力。本研究將以自行車鏈條製造廠為例,將拉式系統應用於生產線上,找出符合實務的導入步驟,設計最佳化方案作為管理者實務上的發展目標。
首先,以價值流圖發現案例公司前置時間過長以及在製品堆積的問題,成為改善的契機,而拉式生產系統對於此兩大問題有著顯著的改善效益,故導入拉式系統;接下來利用離散事件模擬蒐集推式方案下的製程資訊,找找出瓶頸工程,結合限制理論、現場限制、生產線平衡等概念設計出五個改善方案,並利用模擬最佳化求得最佳切點與在製品配置,接著以敏感度分析討論顧客在不同需求情況下,生產系統的變化與因應;最後測試加工批量減半對整體績效指標的影響。
實驗結果與過去推式方案相比,案例公司目前實行的改善方案經過最佳化的結果有最佳的改善效益,在製品改善百分比為55.4%、前置時間改善42.8%;其餘四個方案亦有在製品有54.9%以上、前置時間有25.2%以上的改善,由此可知拉式系統的導入能大幅減少製程中在製品數量,並縮短前置時間,達到降低成本、縮短交期的成果,將來案例公司可以藉由持續改善朝本研究的最佳化方案為發展目標。
英文摘要 Bicycle part manufacturing is an important industry and now is facing to a problem of demand with multiple products and low volume. That is worth to discuss how to reduce stock and waste during process but also fill the order on time. There are many enterprises have been adapting lean method not only to reduce costs and wastes but also enhance product quality and flexibility of productions. This study is conducted to the case firm, a bicycle chain manufacturer, and use pull system to production line. Find the step of importing pull system into practice, and design five optimization schemes which can be the goal of manager.
First, use value stream mapping to find two problems, long lead time and many work in process, as the starting point of kaizen. Pull system has significant effect about this two problems, so this study will import pull system into real production line and use discrete-event simulation to collet productive information, then combine concept such as Theory of Constraints, constrains from work site and Line Balance to design improvement scheme and use Simulation Optimization to find the best cut point and WIP cap. Finally, we conduct a sensitivity analysis to discuss the different scheme’s system performance under the circumstances of customer’s variable demand and half process batch.
The result of optimization scheme which case firm executed has best performance, total WIP reduce 49.7% and average lead time reduce 61.3%. The other four schemes also reduce 49% total WIP and 48% average lead time. Thus we can see importing CONWIP pull system is not only able to reduce total WIP but also shorten average lead time. In the future, case firm can through continuous improvement to achieve optimization scheme’s result of this study.
論文目次
 摘要 i
致謝 iv
目錄 v
表目錄 vii
圖目錄 x
1. 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 4
1.3 研究流程 4
1.4 研究架構 5
2. 文獻探討 6
2.1 精實系統 6
2.2 後拉式生產系統 10
2.3 模擬最佳化 15
2.4 小結 23
3. 研究方法 24
3.1 案例公司簡介 24
3.2 價值流圖 28
3.3 導入精實拉式系統 34
3.4 建立現況與改善模擬模式 36
3.5 模擬最佳化 38
4. 案例分析 39
4.1 現況價值流圖分析 39
4.2 導入精實拉式系統與方案產生 41
表 4.5 內片線平衡資訊 49
4.3 績效指標之決定 52
4.4 模擬模式之建構 52
4.5 未來方案之暖機時間及重複實驗次數之決定 67
4.6 模擬最佳化 67
4.7 實驗結果 70
4.8 敏感度分析 73
5. 結論與建議 78
5.1 結論 78
5.2 未來研究與建議 79
參考文獻 80
附錄A 論文符號說明 82
附錄B改善方案CV趨勢圖 83
附錄C P2~ P9品項之績效指標 87


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