Projects per year
This paper presents a competing risks reliability model for a system that releases signals each time its condition deteriorates. The released signals are used to inform opportunistic maintenance. The model provides a framework for the determination of the underlying system lifetime from right-censored data, without requiring explicit assumptions about the type of censoring to be made. The parameters of the model are estimated from observational data by using maximum likelihood estimation. We illustrate the estimation process through a simulation study. The proposed signal model can be used to support decision-making in optimising preventive maintenance: at a component level, estimates of the underlying failure distribution can be used to identify the critical signal that would trigger maintenance of the individual component; at a multi-component system level, accurate estimates of the component underlying lifetimes are important when making general maintenance decisions. The benefit of good estimation from censored data, when adequate knowledge about the dependence structure is not available, may justify the additional data collection cost in cases where full signal data is not available.
|Number of pages||9|
|Journal||European Journal of Operational Research|
|Publication status||Published - 1 Nov 2011|
- competing risks
- statistical inference
FingerprintDive into the research topics of 'The signal model: a model for competing risks of opportunistic maintenance'. Together they form a unique fingerprint.
- 1 Finished
Dependent competing risks in reliability and maintainability assessment
EPSRC (Engineering and Physical Sciences Research Council)
1/07/05 → 31/01/09