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- W4384831203 abstract "Mission-oriented systems have received intensive attention for extensive applications. Existing maintenance policies focus mainly on unvarying missions, which is inconsistent with many mission-oriented systems. This paper develops a condition-based replacement model for a mission-oriented system subject to internal deterioration, external shocks, and a sequence of random missions. The deterioration level is revealed by condition monitoring performed at the end of each mission. If it exceeds a critical level, both the system and the previous mission fail, resulting in a corrective replacement cost and a penalty for the failed mission. Otherwise, the decision-maker can decide whether to replace the system preventively. This paper proposes a multilevel preventive replacement policy that involves a set of replacement thresholds corresponding to all mission types. The objective is to determine the optimal set of thresholds to minimize the long-run expected average cost per unit time. The optimization problem is formulated in the Markov decision process framework based on a discretization method. An efficient optimization algorithm combining stochastic dynamic programming and Nelder–Mead search is developed to find the optimal policy. Results from a numerical study confirm the effectiveness of the proposed approach." @default.
- W4384831203 created "2023-07-21" @default.
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- W4384831203 date "2023-11-01" @default.
- W4384831203 modified "2023-09-26" @default.
- W4384831203 title "Multilevel preventive replacement for a system subject to internal deterioration, external shocks, and dynamic missions" @default.
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- W4384831203 doi "https://doi.org/10.1016/j.ress.2023.109507" @default.
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