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題名 | 不可靠拉式供應鏈之績效分析及存貨最佳化模擬研究=A Simulation Study of Performance Evaluation and Stock Optimization for Unreliable Pull-type Supply Chains |
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作者 | 王風帆; Wang, Fong-fan; |
期刊 | 修平學報 |
出版日期 | 20130300 |
卷期 | 26 2013.03[民102.03] |
頁次 | 頁161-184 |
分類號 | 494.5 |
語文 | chi |
關鍵詞 | 拉式供應鏈; 供應間斷; 多機平行機臺; 模擬; 存貨優化; Pull-type supply chain; Supply disruption; Parallel multiple servers; Simulation; Stock optimization; |
中文摘要 | 本研究探討拉式供應鏈,在接單及存貨二種生產模式下,假設生產為不可靠多機平行機台,如何量化間斷供給對供應鏈整體績效所造成的影響,當供給間斷時如何在接單生產模式下以較適當產能因應,在存貨生產模式下如何在已知產能下快速優化存貨水準,本研究共模擬三種不同供給間斷模式可提供業界實質應用。 模擬結果對於所提三種不同供給間斷模式顯示,在接單模式不同訂單到達率下,非同步供給間斷模式比同步供給間斷模式有較低訂單等候時間,但在高系統負荷而維修人力較低,且維修人員亦可能休假情況下,同步供給間斷模式則有較低訂單等候時間。在存貨生產模式不同訂單到達率下,同步失效供應鏈所須最佳預備存貨水準及成本均為最高,在非同步失效同樣產能設計下,維修員不失效模式之最佳預備存貨數量及相對應總成本均不高於維修員失效模式,在非同步失效維修員休假模式下,低維修員數比高維修員數需相等或較高預備存貨數量,其相對應總成本亦較高,在非同步失效維修員不休假模式下亦顯現同樣結果。 |
英文摘要 | In this study, we use simulation to study pull-type supply chains under both make-to-order (MTO) and make-to-stock (MTS) supply modes. Assume the manufacturers are unreliable with parallel multiple servers. We quantify the impact of upstream supply disruption on the overall performance of the supply chains. We propose the counteractive measures of capacity design under MTO mode and optimize the stock level for known capacity design under MTS mode when there is supply disruption. In this study we develop three simulation models with supply disruption which may provide practically use for industries. Pertaining to the proposed supply disruption models, simulation results show that there is lower order waiting time for asynchronous supply disruption mode compared to its synchronous counterpart under MTO and different order arrival rates. However the order waiting time under synchronous supply disruption is lower than asynchronous supply disruption where repair manpower is low and repairmen may take vacations when system load is high. Under MTS mode and different order arrival rates the optimal planned inventories and the corresponding total cost per unit time under synchronous supply disruption is the highest. When only asynchronous supply disruption is considered the optimal planned inventories and the corresponding total cost per unit time for the case of repairman vacation are higher than no repairman vacation. The optimal planned inventories and the corresponding total cost per unit time for systems with lower repair manpower are higher than systems with higher repair manpower under asynchronous failure with repairman vacation. The same results are observed in asynchronous failure without repairman vacation. |
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