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자연과학대학
통계학전공
Journal papers
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Replacement Policy for Heterogeneous Items Subject to Gamma Degradation Processes
Title
Replacement Policy for Heterogeneous Items Subject to Gamma Degradation Processes
Authors
Cha J.H.
;
Finkelstein M.
;
Levitin G.
Ewha Authors
차지환
SCOPUS Author ID
차지환
Issue Date
2022
Journal Title
Methodology and Computing in Applied Probability
ISSN
1387-5841
Citation
Methodology and Computing in Applied Probability vol. 24, no. 3, pp. 1323 - 1340
Keywords
Dependent increments
;
Heterogeneous degradation process
;
Hybrid preventive maintenance policy
;
Mixed gamma process
;
Probabilistic analysis
Publisher
Springer
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
A hybrid preventive maintenance policy for heterogeneous degrading items is discussed. It combines the classical age-replacement strategy, when a system is replaced either on failure or at the predetermined age, with replacement of the system when degradation reaches the predetermined level at some intermediate time. Items come from two subpopulations with different reliability characteristics. Non-homogeneous gamma processes model degradation of an item from each subpopulation. We justify probabilistically the superiority of the proposed policy over that for homogeneous populations and over the policy without possibility of additional replacement. The corresponding long-run cost rate is derived for the suggested cost structure. Some detailed numerical illustrations are presented and relevant sensitivity analysis for the main parameters of the model is performed. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
DOI
10.1007/s11009-021-09859-5
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