Competing risks and opportunistic informative maintenance

The present paper makes a link between the literature on competing risks and that of opportunistic maintenance. Three models for competing risk involving censoring through opportunistic maintenance are discussed. One is an existing opportunistic maintenance model, one is a new opportunistic variant...

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Bibliographic Details
Published in:Proceedings of the Institution of Mechanical Engineers. Part O, Journal of risk and reliability Journal of risk and reliability, 2009-12, Vol.223 (4), p.363-372
Main Authors: Bedford, T, Alkali, B M
Format: Article
Language:English
Subjects:
Coal-fired power plants
Computer simulation
Decision making
Electric power generation
Electric power plants
Links
Maintenance
Mathematical models
Mechanical engineers
Preventive maintenance
Reliability
Repair & maintenance
Risk
Simulation
Theory
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Summary:The present paper makes a link between the literature on competing risks and that of opportunistic maintenance. Three models for competing risk involving censoring through opportunistic maintenance are discussed. One is an existing opportunistic maintenance model, one is a new opportunistic variant on an existing competing risk model, and the third is a new model that captures the notion of opportunistic informative maintenance. These models show that even though opportunities may occur according to a process that is independent of the failure process, the appropriate competing risk models may still involve dependencies. This work was motivated by observation of practices in a coal-fired power plant consisting of four generating units, which is briefly described. Through simulation examples it is shown how these competing risk models can be used to support decision making about maintenance rules, and the identifiability issues associated with the models are discussed. Competing risk theory addresses statistical estimation problems which are a common concern in much of the maintenance literature, and focuses attention on non-age-related information available to maintainers.
ISSN:1748-006X
1748-0078
DOI:10.1243/1748006XJRR242