关键词: 回收物流, 库存控制, 回收中心, 处理工厂, 优化模型, 非线性规划

Abstract: To reduce the cost of returned logistics, an appropriate approach for production inventory control in returned logistics system was proposed. By considering the relationship of used product supply from a collection center and the demand for a processing factory, a bi-echelon production inventory optimization model for the collection center and the processing factory integrated system was constructed. With the help of the model, the following items could be acquired, such as the center's transportation batches within an operation period, the optimal transportation quantity ratioes for each of the rest batches to the first batch and the average expense per unit time related to the production inventories in the system. Based on these, the center's and the factory's minimal storage spaces for used products, average production inventory quantities and corresponding inventory holding costs within an operation period could be computed respectively. In order to facilitate the application of the model, the method to determine upper bound of the optimal transportation batches was discussed, the Decomposition-Comparison (D-C) means to acquire the final solutions was presented. Finally, effectiveness of the model and the D-C means was verified by an example.

Key words: returned logistics, inventory control, collection center, processing factory, optimization model, non-linear programming