On a new age-replacement policy for items with observed stochastic degradation
- 주제(키워드) age replacement , gamma process , gradual failure , long-run cost rate , preventive maintenance
- 등재 SCIE, SCOPUS
- 발행기관 John Wiley and Sons Ltd
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000169467
- 본문언어 영어
- Published As https://dx.doi.org/10.1002/qre.2619
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
A new methodology for preventive maintenance of degrading items is discussed. It combines the classical age-replacement strategy when a system is replaced either on failure or on reaching the predetermined age, with replacement on reaching the predetermined level of deterioration at some intermediate time. Degradation of an item is modeled by the nonhomogeneous gamma process, whereas its failure occurs when this process reaches the predetermined deterministic level. It is shown that the proposed policy outperforms the classical one, i.e., it achieves the lower value of the corresponding long-run cost rate. The detailed numerical illustration is presented, and the relevant sensitivity analysis for the main parameters of the model is performed. © 2020 John Wiley & Sons, Ltd.
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