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자연과학대학
통계학전공
Journal papers
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A new warranty policy for heterogeneous items subject to monotone degradation processes
Title
A new warranty policy for heterogeneous items subject to monotone degradation processes
Authors
Cha J.H.
;
Finkelstein M.
Ewha Authors
차지환
SCOPUS Author ID
차지환
Issue Date
2022
Journal Title
Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability
ISSN
1748-006X
Citation
Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability vol. 236, no. 1, pp. 55 - 65
Keywords
heterogeneous populations
;
mixed degradation process
;
optimal policy
;
Renewable warranty
Publisher
SAGE Publications Ltd
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
A new renewable warranty policy is suggested that increases the probability of its success and can decrease the corresponding costs for certain ranges of parameters. It deals with heterogeneous populations of items from two subpopulations (‘weak’ and ‘strong’) and is aimed at elimination and further replacement of weak items after screening at some optimal time. This elimination is performed when degradation described by the corresponding mixed degradation process reaches some optimally predetermined level. Probabilistic and cost analyses of the model are performed and the illustrative example is presented. It is shown that the proposed warranty policy with inspection outperforms the conventional one in a probabilistic sense. Furthermore, the proposed policy becomes economically beneficial especially when the additional penalty cost caused by a sudden failure is large. © IMechE 2021.
DOI
10.1177/1748006X211028712
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