Modeling lateral transshipments in multiechelon repairable-item inventory systems with finite repair channels

Authors:
Bong-Ryong Jung;Byung-Geun Sun;Jong-Soo Kim;Sun-Eung Ahn
Affiliations:
Department of Industrial Engineering, Hanyang University, Ansan 425-791, South Korea;Department of Industrial Engineering, Korea University, Seoul 136-701, South Korea;Department of Industrial Engineering, Hanyang University, Ansan 425-791, South Korea;Department of Industrial Engineering, Hanyang University, Ansan 425-791, South Korea
Venue:
Computers and Operations Research
Year:
2003

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Abstract

This article concerns the problem of determining the optimal spare inventory level for a multiechelon repairable-item inventory system, which has several bases and a central depot. When an item fails, the failed item is replaced immediately if a spare is available at the base. If there is no spare item available at the base, it is requested as a lateral transshipment to another base that has a spare in stock. If an item is not available from any of the bases, the item is backordered until a spare becomes available. We propose a model to describe the behavior of the system and develop an algorithm to find the spare inventory level at each base, which minimizes the total expected cost of the system. The algorithm is illustrated using examples of various sizes.