고려대학교

초록/요약

This paper presents a readily applicable model for determining the optimal Concurrent Spare Parts inventory levels, attempting to foster the real world situation. The supply and repair system for the advanced electronics equipment is comprised of three main echelon: Base support phase made up of several bases equipped with their own maintenance machinery; Depot support phase with limited maintenance and support capabilities; and Overseas supply phase which handles the international production and supply. This article classifies spare parts into two broad categories: Assembly and Component. The presented repair algorithm is as follows. When a detective item, whether an assembly or a component, is identified, immediate replacement is to be considered from stored inventories before considering repairment. When an assembly fails and if the inventory for the assembly is insufficient, the presented procedure attempts to utilize the inventories of the components. It is also possible, when in need, to replenish the assembly from adjacent bases. The results of this analysis show that the presented model outperforms previous models in reducing the supply and repair time. When a certain level of equipment utilization is to be sustained within the minimal amount of budget, the multi-echelon inventory model would also yield sufficient cost reduction. It is claimed that the results of this paper would raise an issue of improving traditional approaches in Concurrent Spare Parts acquisition and inventory management.