关键词: 可维修备件系统, 连续时变需求, 回收率, 总库存成本

Abstract: Aiming at the related situations of demand rate and recovery rate in finite planning horizon, a repairable spare parts inventory model of continuous time-varying demand was proposed, in which supplied new spare parts with recovery spare parts. For simplicity, we assume that there was no collection of used items during the repair uptime and downtime periods. Based on minimization of related total inventory, the reverse logistics inventory optimization strategy of raw materials procurement, new items manufacture and recovered items repair was discussed. Due to the coexistence of real and integer decision variables, NP was a difficult problem. Thus the solving steps were proposed by using recursive algorithm, and the effectiveness of solving algorithm was illustrated through two numerical examples. Finally, the performance and sensitivity of inventory model were analyzed by examples.

Key words: repairable spare parts system, continuous time-varying demand, return rate, total inventory cost, reverse logistics