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Optimal replacement policy under a general failure and repair model: Minimal versus worse than old repair

Title
Optimal replacement policy under a general failure and repair model: Minimal versus worse than old repair
Authors
Badía F.G.Berrade M.D.Cha J.H.Lee H.
Ewha Authors
차지환
SCOPUS Author ID
차지환scopus
Issue Date
2018
Journal Title
Reliability Engineering and System Safety
ISSN
0951-8320JCR Link
Citation
vol. 180, pp. 362 - 372
Keywords
Generalized Pólya ProcessMaintenanceOptimum policyWorse-than-minimal-repair
Publisher
Elsevier Ltd
Indexed
SCI; SCIE; SCOPUS scopus
Abstract
We analyze the optimal replacement policy for a system subject to a general failure and repair model. Failures can be of one of two types: catastrophic or minor. The former leads to the replacement of the system, whereas minor failures are followed by repairs. The novelty of the proposed model is that, after repair, the system recovers the operational state but its condition is worse than that just prior to failure (worse than old). Undertrained operators or low quality spare parts explain this deficient maintenance. The corresponding failure process is based on the Generalized Pólya Process which presents both the minimal repair and the perfect repair as special cases. The system is replaced by a new one after the first catastrophic failure, and also undergoes two sorts of preventive maintenance based on age and after a predetermined number of minor failures whichever comes first. We derive the long-run average cost rate and study the optimal replacement policy. Some numerical examples illustrate the comparison between the as bad-as-old and the worse than old conditions. © 2018 Elsevier Ltd
DOI
10.1016/j.ress.2018.07.032
Appears in Collections:
자연과학대학 > 통계학전공 > Journal papers
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