A Three-Echelon Inventory Model for Repairable Items with Capacity Constraint

수리용량의 제한이 있는 수리가능한 부품의 3단계 재고시스템에 관한 연구

We consider a multiechelon repairable-item inventory system where several bases are supported by a central depot and the external repair facilities. Unlike METRIC- based models, there are only a finite number of repair channels at each base, central depot and the external repair facilities. It is desired to find repair capacities and spares level which together guarantee a specified service level at minimum cost. Closed queueing network theory is used to model the stochastic process. The purpose of this paper is to derive the steady-state distributions of this system.