ASQ - Electronics and Communications Division

Spares Provisioning for Repairable Systems under Fleet Expansion

Abstract: © 2011 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must first be obtained from the IEEE.

We consider a spares provisioning problem in which a fleet of identical repairable systems is acquired in stages over time. Each system comprises a series of line replaceable units (LRU) so as to achieve a high availability level. The first part of the paper deals with the methods for making statistical inferences on LRU reliability, and the second part deals with the policy of optimal spare unit provisioning based on the output of reliability analysis. In particular, in the former, we consider a realistic scenario when system failures are nonstationary and triggered by multiple s-dependent competing risks. In the latter, the inventory system dynamics are analyzed and an optimal spare provisioning policy is obtained.

Keywords: RAMS 2011 Proceedings - Product Reliability - Reliability Model - Warranty

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