Selective maintenance modeling and analysis of a complex system with dependent failure modes
- Quality Engineering
- July 2020
- Volume 32 Issue 3
- pp. 509-520
- Ruiz, Cesar, Pohl, Edward A., Liao, Haitao
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In this paper, we propose a statistical and optimization framework for selective maintenance of a complex system with components that have multiple failure modes. Specifically, we study the case where each component has multiple instantaneous hard failure modes and a single soft failure mode. An imperfect maintenance action reduces the effective age and degradation level of a component while increasing the mean degradation parameter and the failure rates of hard failures. A numerical example illustrates the application of the proposed framework and the effectiveness of the Genetic Algorithm and Differential Evolution heuristics in solving such maintenance optimization problems.