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Title: 不確定前置時間與趕工成本為多項式在品質不可靠環境下之整合供應鍊存貨系統
Authors: 楊明峰;羅明正;涂宏任
Contributors: 國立臺灣海洋大學:運輸科學系
Keywords: 整合存貨;前置時間;多項式;現值
Integrated inventory;Variable lead time;Polynomial;Present value
Date: 2009-08
Issue Date: 2013-05-29T01:57:29Z
Publisher: 行政院國家科學委員會
Abstract: 摘要:在今日全球供應鏈環境的高度競爭及需求快速變化下,縮短前置時間以及相關存貨 成本是最重要的課題之一。在過去大部分的研究中,計算成本或利潤時皆未考量到其時間成 本,然而在現實生活中快速的通貨膨脹,對於企業已造成不小的影響。因此在本研究中,我 們考量了時間成本,發展出一套適用於不可靠環境下的整合存貨模型,並假設可控前置 時間的趕工成本為一多項式,利用縮短前置時間而達到最低現值之期望總成本,同時推 導出最佳零售商訂購量、最佳前置時間以及產品從供應商至零售商的最佳運送次數,以 發展出最佳存貨策略演算法,尋求買賣雙方之最低成本。本研究將搭配數值範例以說明 此存貨模型的結果。範例結果顯示,不良品的發生會導致此存貨模型之總成本增加。因 此,在考慮諸多現實因素下,本研究所提出之整合存貨模型,是非常符合現實環境的新 存貨模式,並可供企業作為存貨策略的參考依據。
Abstract:Due to increasing challenges and changing demand in today’s highly competitive global supply chain environment, reducing lead time and the associated inventory cost are the most important issues in the supply chain. In most of the past studies, they do not consider with time value. However, the effect of inflation is too critical to ignore. So we considered time value and develop an improved integrated inventory model with imperfect quality items and variable lead time which assumed dependent crashing cost is polynomial. It aims at shortening the lead time so as to reduce the present value of integrated inventory joint expected total cost over infinite time horizon. The goal of this study is to derive simultaneously the optimal order quantity, the length of lead time and the number of lots which are delivered from the vender to the buyer. Finally, an algorithm procedure of finding the optimal solution is developed, and some numerical examples are given to illustrate results.
Relation: NSC98-2410-H412-002
Appears in Collections:[Department of Transportation Science] Research Reports

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