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Decline and repair and covariate effects

Wu, Shaomin and Scarf, PA 2015, 'Decline and repair and covariate effects' , European Journal of Operational Research, 244 (1) , pp. 219-226.

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Abstract

The failure processes of repairable systems may be impacted by operational and environmental stress factors. To accommodate such factors, reliability can be modelled using a multiplicative intensity function. In the proportional intensity model, the failure intensity is the product of the failure intensity function of the baseline system that quantifies intrinsic factors and a function of covariates that quantifies extrinsic factors. The existing literature has extensively studied the failure processes of repairable systems using general repair concepts such as age-reduction when no covariate effects are considered. This paper investigates different approaches for modelling the failure and repair process of repairable systems in the presence of time-dependent covariates. We derive statistical properties of the failure processes for such systems.

Item Type: Article
Themes: Energy
Schools: Schools > Salford Business School > Business and Management Research Centre
Journal or Publication Title: European Journal of Operational Research
Publisher: Elsevier
Refereed: Yes
ISSN: 0377-2217
Related URLs:
Funders: Non funded research
Depositing User: Dr Philip Scarf
Date Deposited: 04 Feb 2015 18:23
Last Modified: 29 Oct 2015 00:46
URI: http://usir.salford.ac.uk/id/eprint/33494

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