A maintenance policy for repairable systems based on opportunistic failure-rate tolerance
Zheng, Xitong Fard, Nasser
Zheng, Xitong
Fard, Nasser
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1991-06-30
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Keywords
Corrective replacement,Hazard rate,Opportunistic,Preventive replacement,Repair
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Citation
X. Zheng and N. Fard, "A maintenance policy for repairable systems based on opportunistic failure-rate tolerance," in IEEE Transactions on Reliability, vol. 40, no. 2, pp. 237-244, June 1991, doi: 10.1109/24.87134
Abstract
An opportunistic hazard rate replacement policy for a repairable system with several types of units is presented. A unit is repaired at failure when the hazard rate falls in (0, L - u). A unit is replaced at failure when the hazard rate falls in (L-u, L). An operating unit is replaced when its hazard rate reaches L. When a unit is replaced because its hazard rate reaches L, all operating units with their hazard rates falling in (L - u, L) are replaced. The long-run mean cost rate as a function of L and u is derived. Optimal L and u are obtained to minimize the total maintenance cost rate. Application and analysis of results are demonstrated through a numerical example. The maintenance model is designed for a system with multi-type units. Each type has its own increasing hazard rate. Units are repaired or replaced depending on their hazard rate at a failure or active replacement of another unit. The repair interval, replacement limit, and replacement tolerance are determined to yield the optimal total maintenance cost rate. Reader Aids - Purpose: Present a model Special math needed for derivation: Probability theory Special math needed to use result: Same Result useful to: Reliability and maintenance analysts. © 1991 IEEE
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This is an open access article under the CC by license
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IEEE
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IEEE Transactions on Reliability
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00189529