前置時間可縮短之最適經濟訂購策略研究__臺灣人文及社會科學引文索引資料庫

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題名：	前置時間可縮短之最適經濟訂購策略研究
作者：	羅行文
校院名稱：	國立臺灣科技大學
系所名稱：	工業管理系
指導教授：	潘昭賢
學位類別：	博士
出版日期：	2005
主題關鍵詞：	前置時間；Lead time
原始連結：	連回原系統網址
相關次數：	被引用次數:期刊(1) 博士論文(0) 專書(0) 專書論文(0) 排除自我引用:1 共同引用:0 點閱:0

在現今競爭激烈的市場環境當中，由於資訊科技的進步，企業運用電子化相關技術來達成及時化生產的方法以維持本身的競爭優勢。而在過去一般有關存貨的相關研究中，前置時間常常是我們考慮的重要因素之一，傳統的存貨模式大都將前置時間視為已知且為不可控制的常數或隨機變數，但在許多實際的情況中，其實前置時間是可以透過一些方式加以縮短的，尤其在今日工商業競爭的時代，講求時效、縮短前置時間乃是企業致勝不可或缺的主要因素之一，也是值得探討且可研究的課題。然而，當缺貨發生時，為了避免購買者則不願意等待且轉而向別的廠商購買，供應商可以提供價格上的折扣，以補償忠誠顧客無法滿足需求的損失，以提高購買者等待欠撥的意願。
本論文旨在針對前置時間內需求量服從常態分配和機率分配未知的假設下，而提出四不同存貨模型，並得出最適訂購政策。首先，第一章說明研究動機與目的。第二章做相關文獻探討。第三章探討欠撥折扣、安全因子與趕工成本包含固定及變動成本的存貨模型。第四章探討訂購成本具有學習效應之存貨模式。本論文根據存貨模式目標函數的性質，提供有效率的程序演算法，使得能快速且正確決定最適存貨決策法則。本論文並針對每一模式舉數值範例加以說明演算法的執行程序。最後，在第五章將各章所得結論做一總結，並說明未來發展方向。

以文找文

Lead time reduction has been one of the major factors in the successful implementation of the popular just-in-time (JIT) inventory system. In many practical situations, this controllable lead time can be decomposed into several components, each having a crashing cost for the reduced lead time and the associated crashing expenses contains a fixed cost and a variable cost per unit product. If an item is out of stock in an inventory system in which shortage is allowed, the supplier may offer a negotiable price discount to the loyal, patient and captive customers to compensate for the inconvenience of backordering.
This article develops four integrated inventory models for minimize the expected total annual cost. The objective is to determine the optimal inventory policies while the probability distribution of the lead time demand is normal and distribution free. Numerical examples are presented to illustrate the procedures of the proposed solution algorithms. First of all, Chapter 1 states research motive and purpose. Chapter 2 literatures review the related papers and discussion. Chapter 3 studies the integrated inventory systems with the objective to simultaneously optimizing the order quantity, lead time, backordering and reorder point. This controllable lead time can be decomposed into several components, each having a crashing cost for the reduced lead time and the associated crashing expenses contains a fixed cost and a variable cost per unit product. There are two inventory models proposed in the chapter, one with normally distributed demand, and another with generally distributed demand. Numerical examples are included to illustrate the procedures of the algorithms. Chapter 4 investigates the impact of learning curve effect on ordering cost for the continuous review inventory model involving controllable lead time with the mixture of backorder and partial lost sales. The objective of this study is to minimize the expected total annual cost by simultaneously optimizing order quantity, safety factor and lead time under different setup learning rates. Finally, Chapter 5 makes a summary of every chapter conclusion and some future research topics.

以文找文

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