关键词: 两级供应链, 易变质产品, 库存模型, 时变需求

Abstract: A deteriorating inventory model for a single product under a two-echelon integrated supply chain environment in a given time horizon was studied. This inventory system consisted of a manufacturer and a retailer. Single continuous production at a given production rate and multiple batch ordering were considered. Inventory models for the manufacturer and the retailer were developed when deteriorating rates were constant, and demand rate of customer decreased linearly with time and depended on retailer′s current inventory level. The objective was to develop an optimal ordering strategy for retailers to minimize the average total cost of this inventory system. An algorithm to calculate the manufacturer′s optimal production time was derived. Finally, a numerical example was given to illustrate the results of the model. The minimum average total cost was derived respectively from the perspectives of the manufacturer, the retailer and the integrated system. Result showed that the integrated strategy resulted in the lowest average total cost as compared to independent decision approaches.

Key words: two-echelon supply chain, deteriorating item, inventory model, time-varying demand