OPTIMAL ORDERING POLICIES OF SOME DETERMINISTIC INVENTORY MODELS WITH ADVANCE BOOKING DISCOUNT ITEMS

• Main Authors: Ming-Wei Weng, 翁明偉
• Other Authors: 張紘炬
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/00227535501959169447

博士 === 淡江大學 === 管理科學研究所博士班 === 97 === In business dealing, there exists many factors like advance booking discount to make retailers buy goods early. For companies, the advance booking discount strategy is common and useful in reality to decrease the estimation error in demand and to increase the market share. Furthermore, in real life, the demand is usually influenced by time. In the growth stage of a product life cycle, the demand rate can be well approximated by a linear form or exponential form. The retailer sells the product through an advance booking discount and aiming to optimize price discount and replenishment cycle time to maximize total profit per unit time. Next, the supplier would offer the retailer a delay period M and the retailer could sell the goods and accumulate revenue and earn interest within the trade credit period. Furthermore, the retailer also offer the customer a delay period N to stimulate his/her customer demand to develop the retailer’s replenishment model(N < M ). Under these conditions, we model the retailer’s inventory system as a cost minimization problem to determine the retailer’s optimal ordering policies. Further, the general assumption in classical inventory models is that the organization owns a single warehouse without capacity limitation. In practice, while a large stock is to be held, due to the limited capacity of the owned warehouse (denoted by OW), one additional warehouse is required. This additional warehouse may be a rented warehouse (denoted by RW), which is assumed to be available with abundant capacity. However, the backlogging rate in classical inventory models based on the waiting time are realistic only if the supply chain between the retailer parties and the customer parties has enabled share information through the well channel partnership. This thesis is consisted of five chapters. In Chapter 2, we first explores a generalized inventory control system for deteriorating items with time-varying demand under advance booking discount and two-echelon trade credits. In Chapter 3, we extend Chapter 2’s model and then propose a finite time horizon inventory model for deteriorating items with time-varying demand through an ABD program. We further simplify the search process by providing an intuitively good starting value for the optimal number of replenishments and the optimal replenishment cycle time. In Chapter 4, we present a deterministic inventory model for deteriorating items with two warehouses under ABD program. Moreover, we assume that the backorder cost per unit time is a linearly function and partial backlogging δ . The necessary and sufficient conditions of the existence and uniqueness of the optimal solutions for the three models are shown. Some numerical examples are used to illustrate the three model and conclude the thesis with suggestions for possible future research.