供應鏈中品質不可靠環境下考慮現值且趕工成本為多項式函數之整合存貨模型

An Integrated Inventory Model with Present Value and Dependent Crashing Cost is Polynomial under the Imperfect Production Process in the Supply Chain

林玫欣(Mei-Hsin Lin)

指導教授 ： 邱垂昱

國立臺北科技大學/管理學院/工業工程與管理研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00292

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、最佳生產良率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。本論文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，本論文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。

關鍵字

整合存貨 ； 前置時間 ； 多項式 ； 現值 ； 不良品

並列摘要

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 crashing cost which determined by the length of lead time 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 paper is to derive simultaneously the optimal order quantity, the length of lead time, process quality 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.

並列關鍵字

integrated inventory ； variable lead time ； polynomial ； present value ； imperfect production

參考文獻

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