- 學位論文
限制理論排程之流程指標模擬研究
A Simulation Study on the Flow Effectiveness of TOC Scheduling
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摘要
在這個追求及時、數據、雲端的時代，在面對當今市場需求多變的環境下，產業除了追求產能之外，市場需求的反應能力亦是產業競爭力的重要指標，而在同業的競爭壓力下，如何運用有限資源創造更大的利益依然是產業的主要考驗。 本研究以金屬實業為例，利用Arena系統模擬軟體進行現況模型的建立並模擬，透過改變訂單需求產生的頻率及導入限制理論的限制驅導式排程(Drum-Buffer-Rope；DBR)，探討生產線的差異性，將模擬結果以產品流程時間(Product Total Time)、訂單流程時間(Order Total Time)、在製品(Work in Process)、訂單延遲時間(Order Tardiness Time)、訂單延遲件數(Order Tardiness Unit)作為績效指標，此外本研究以林絡研(2016)提出流量值(Flow Value)作為生產系統物流績效的衡量指標，針對各製程在製品堆積數量及週期時間估算在生產線內部的停滯時間，進而評估整體生產線的流暢程度。
並列摘要
In today's quick changing market demands, a company’s competiveness relies on its ability to respond in time and in good service to customers’ demands. This requires effectively optimized the limited resources under gradually increased pressure from competition. In this study, using metal industry as an example, simulation models constructed from ARENA software are validated and used as platform to examine the effectiveness of DBR (Drum-Buffer-Rope) scheduling over push/pull hybrid approach. With proper experimental design, this study finds that the performance of a push/pull hybrid approach depends on the length of periodic order release, with respect to product total time, order total time, work-in-processes (WIPs), order tardiness, number of unit tardy, and flow value. Flow value (Lin, 2016) is a measure of the logistics performance of a production system, adopted in this study to evaluate the stagnation time of the production line in terms of the quantity and cycle time of the products. In addition, DBR scheduling can further improve system’s performance. With examined using a sensitivity analysis, DBR scheduling outperforms push/pull hybrid approach in all three types of demand patterns.
參考文獻
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