关键词: 备件, 随机折损, 设备维修, 库存分配, 补货

Abstract: To study spare parts inventory management and equipment maintenance problem, in which both equipment failure and the lifecycle of the spare parts were stochastic. Equipment classification method according to its importance was proposed, and a maintenance policy with inventory allocation policy was put forward among different types of faulty equipment in which backorder was allowed for sustaining production in safe and efficient way. Through constructing dynamic programming model, the optimal spare parts inventory policy and equipment maintenance policy with the optimal time-based critical inventory level for each class was derived. Finally, numerical analysis was provided. Comparing to first-come-first-served maintenance policy, the proposed policy could significantly reduce the equipment maintenance cost and reduce the loss caused by spare parts deterioration.

Key words: spare parts, stochastic deterioration, equipment maintenance, inventory allocation, replenishment