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Journal of Korean Society for Quality Management 1990;18(2): 9-. |
| 예비품(豫備品) 재고관리(在庫管理)를 위한 정량발주모형(定量發注模型) |
| 정상일1, 신주항2, 박영택1 |
1성균관대학교 산업공학과
2국방과학연구소 |
| A FOQ Model for Spare-Part Inventory Control |
| Sang-Il Jeong1, Ju-Hang Sin2, Yeong-Taek Park1 |
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| ABSTRACT |
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This paper deals with a FOQ( ; fixed-order quantity) model for spare-part inventory control. In a spare-part inventory problem, stock depletion arises not from external market demand but from internal demand resulting from failures of parts in use. The problem differs from the classical inventory problem in that the demand for a failed part never arises more during stockout period, since the unit remains inoperative when stockout occurs until the failed part is replaced by new one. In the problem under consideration, n identical units are operating simultaneously and failed one is replaced immediately by new one if on-hand spares remain. In order to replenish spares, an order with quantity Q is placed whenever the number of on-hand spares falls to levels. The average annual cost of operating the spare-part inventory system is derived under the assumption that both lifetime of a part and replenishment lead-time distributions are exponential. |
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