关键词: 供应链管理, 网络均衡, 多期, 零售商回收, 变分不等式

Abstract: In this paper, we study a multi-period closed-loop supply chain network equilibrium problem with the used products collected by retailers. Manufacturers sell the products to the consumers to meet the consumer market demand through retailers who are the collection activity undertakers of used products from consumer markets for the manufacturers remanufacturing. The adjacent planning periods are connected through products inventory and recycled used products. Using the theories of variational inequality and complementarity as a tool, we depict the equilibrium of manufacturing market, retail market and demand market respectively, and then we establish the closed-loop supply chain network equilibrium model. We employ the projection and contraction algorithm to solve the model presented. Taking a numerical example we analyze the influence of usable rate of used materials on network equilibrium states and the profit of supply chain members. When the usable rate of manufacturers increases gradually, the transaction amount of collected used products gradually increases, and the manufacturer’s profit first decreases and then increases, whereas retailer’s profit increases all along, and the total profit of supply chain increases all the time, the optimal decision variables is mainly affected by the collected amount constraint in the supply chain network.

Key words: supply chain management, network equilibrium, multi-period, retailer collection, variational inequality