Decline and repair, and covariate effects

Wu, Shaomin and Scarf, Philip 2015. Decline and repair, and covariate effects. European Journal of Operational Research 244 (1) , pp. 219-226. 10.1016/j.ejor.2015.01.041

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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 quantify 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 probabilistic properties of the failure processes for such systems.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Business (Including Economics)
Publisher:	Elsevier
ISSN:	0377-2217
Date of First Compliant Deposit:	7 December 2020
Date of Acceptance:	20 January 2015
Last Modified:	09 Dec 2020 14:45
URI:	https://orca.cardiff.ac.uk/id/eprint/136872

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