臺灣博碩士論文加值系統

本研究探討在生產單一產品的環境下，進行不同分段型態之Multi-CONWIP (Multi-CONstant Work-In-Process) 拉式生產系統模擬實驗，並跟看板生產系統和CONWIP生產系統比較其系統績效。主要系統績效衡量的指標為平均在製品數量、週期時間、產出率與服務水準，而設定工作站數目有六、八與十工作站。評估的項目有 (1) 當生產系統的分段型態為等量分段時，評估不同分段數下之系統績效，(2) 若為非等量分段，則評估不同分段數與分段點組合下之系統績效差異，以及(3) 評估看板系統、CONWIP系統與Multi-CONWIP系統之系統績效。
模擬實驗數據顯示看板系統、CONWIP系統與Multi-CONWIP系統隨總看板數的增加，三種系統的平均在製品數量與週期時間隨之增加，而產出率與服務水準相對也隨之提高。Multi-CONWIP系統無論是採用等量分段或是非等量分段，隨著系統分段數的增加，系統累積的變異也隨之增加，使系統的產出率與服務水準隨之下降。在相同分段數下，相較於等量分段Multi-CONWIP系統，非等量分段Multi-CONWIP系統有較高的產出率與服務水準。在相同工作站數與總看板數的條件下，CONWIP系統有最高的產出率與服務水準，而看板系統的產出率與服務水準最低。

This research studies the performances of the kanban, multi-CONWIP, and CONWIP (CONstant Work-In-Process) pull production systems. The performance measures used to evaluate the systems are work in process, cycle time, throughput, and service level. Simulation models of six, eight, and ten-workstation pull production systems are established for experiments. Also sets the isometric segment and non-isometric segment systems of multi-CONWIP system are evaluated.
Simulation results show that work in process, cycle time, throughput, and service level of the system increase as the total number of cards in the system increases. When the number of segments in multi-CONWIP systems increases, throughput and service level decrease for both systems of isometric and non-isometric segments. With the same number of segments in the Multi-CONWIP system, the non-isometric system has a higher throughput and service level than the isometric system. With the same number of cards which is an upper limit on the WIP for all three systems, the CONWIP system has the best performance of throughput and service level while the kanban system performs worst. However, the CONWIP system also has largest WIP and cycle time.

摘要 i
Abstract ii
目次 iii
表目錄 v
圖目錄 vi
第一章 緒論 1
1.1 研究背景與動機 1
1.2 研究目的 3
1.3 研究範圍與限制 3
1.4 研究流程與章節架構 4
第二章 文獻探討 6
2.1 看板生產系統 6
2.2 CONWIP生產系統 9
2.3 MULTI-CONWIP生產系統 12
2.4 拉式生產系統之比較 14
2.5 看板與在製品之關係 17
第三章 研究方法與模型建構 22
3.1 系統模擬的基本觀念 22
3.1.1 系統的基本觀念 22
3.1.2 模擬的基本觀念 24
3.1.3 模擬之類型 26
3.2 PROMODEL 4.2模擬軟體 26
3.3 模型建構 28
3.4決定模擬之次數 33
第四章 模擬實驗與數據分析 35
4.1 六工作站之模擬 35
4.1.1 等量分段Multi-CONWIP系統 36
4.1.2 非等量分段Multi-CONWIP系統 37
4.1.3看板系統、CONWIP系統與Multi-CONWIP系統 40
4.2 八工作站之模擬 44
4.2.1 等量分段Multi-CONWIP系統 44
4.2.2 非等量分段Multi-CONWIP系統 46
4.2.3看板系統、CONWIP系統與Multi-CONWIP系統 49
4.3 十工作站之模擬 52
4.3.1 等量分段Multi-CONWIP系統 52
4.3.2 非等量分段Multi-CONWIP系統 54
4.3.3看板系統、CONWIP系統與Multi-CONWIP系統 58
第五章 結論與建議 62
5.1 結論 62
5.2 建議 63
參考文獻 65

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