Hazard-rate tolerance method for an opportunistic-replacement policy
Zheng, Xitong Fard, Nasser
Zheng, Xitong
Fard, Nasser
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1992-03-31
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Article
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Keywords
Failure replacement,Hazard rate,Preventive replacement
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Citation
X. Zheng and N. Fard, "Hazard-rate tolerance method for an opportunistic-replacement policy," in IEEE Transactions on Reliability, vol. 41, no. 1, pp. 13-20, March 1992, doi: 10.1109/24.126664
Abstract
A model is presented for a system with several types of units. A unit is replaced at failure or when its hazard (failure) rate exceeds limit L, whichever occurs first. When a unit is replaced because its hazard rate reaches L, all the operating units with their hazard rate falling in the interval (L – u,L) are replaced. This policy allows joint replacements and avoids the disadvantages resulting from the replacement of new units, down time, and unrealistic assumptions for distributions of unit life. The long-run cost rate is derived. Optimal L and U are obtained to minimize the average total replacement cost rate. Application and analysis of results are demonstrated through a numerical example. © 1992 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