整合性存貨模式在考慮不良品及延遲付款期限下之最佳策略

Optimal Strategy for the Integrated Vendor-Buyer Inventory Model with Imperfect Quality Items and Permissible Delay in Payments

賴奕盛(Yi-Sheng Lai)

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(2007年)

摘要

在今日全球化的高度競爭下，迫使企業必須要隨時提供產品與服務，以快速地回應客戶需求，如此才能佔有市場、領先對手，因此使得供應鏈管理扮演非常重要的角色。然而，在供應鏈中的存貨金額通常佔企業資本相當高的比例，故如何有效率地進行存貨控制顯得更加重要。
本論文的目的是在研究買賣雙方彼此在合作的關係下，針對許多在傳統的存貨模式研究中，不合實際的情形加以修正，並在考慮一般的需求曲線、生產可調整、延遲付款期限以及不良品發生的假設條件下，推導出對應之整合性存貨模式，之後再對此存貨模式的目標函數內各變數進行探討，以發展出最佳存貨策略決定演算法，尋求買方與賣方之總利潤最大化。
本論文會搭配數值範例以說明此存貨模式的結果。範例結果顯示，延遲付款期限策略的採用，對於買賣雙方來說，確實是能創造共贏的局面，接著，當賣方的生產率愈接近買方的需求率時，則此存貨模型之總利潤會隨之上升，另外結果也顯示，不良品的發生會導致此存貨模型之總利潤下降。因此，在考慮諸多現實因素下，本論文所提出之整合性存貨模式，是非常符合現實環境的新存貨模式，期能作為企業實際運用之參考。

關鍵字

整合性存貨模式 ； 需求曲線 ； 生產可調整 ； 延遲付款期限 ； 不良品

並列摘要

In this highly global competition of the products and service, the enterprises are forced to supply as faster as requirments of custumers. Their initiative in quick response will promote them to occupy the market and be in the lead. So managing their supply chain effectively plays a crucial role for achieving quick response to customers. However, the amount of capital invested in stock usually accounts for the enterprises a quite high proportion, and inventory control becomes more and more important in this situation.
The assumptions necessary to rationalize the use of traditional inventory models are seldom satisfied. So the objective of this study is to develop an improved inventory model and its solution algorithm to help the enterprises to advance their profit increasing and cost reduction in a single vendor-single buyer environment with general demand curve, adjustable production rate and imperfect quality items under permissible delay in payments.
Finally, numerical examples are given to explain the proposed solution procedure. The results of examples illustrate that applying the permissible delay in payments strategy can create a win-win situation between the vendor and the buyer. Next, the profit rise of the whole model follows the vendor’s production rate is close to the buyer’s demand rate. Furthermore, imperfect quality items will cause the profit loss of the whole model. So for more closely conforming to the actual inventories and responding to the factors that contribute to inventory costs, our proposed new model can be the references to the business applications.

並列關鍵字

Integrated inventory model ； Demand curve ； Adjustable production rate ； Permissible delay in paymentsImperfect quality items

參考文獻

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