Title
Repairable system analysis in presence of covariates and random effects.
Abstract
This paper aims to model the failure pattern of repairable systems in presence of explained and unexplained heterogeneity. The failure pattern of each system is described by a Power Law Process. Part of the heterogeneity among the patterns is explained through the use of a covariate, and the residual unexplained heterogeneity (random effects) is modeled via a joint probability distribution on the PLP parameters. The proposed approach is applied to a real set of failure time data of powertrain systems mounted on 33 buses employed in urban and suburban routes. Moreover, the joint probability distribution on the PLP parameters estimated from the data is used as an informative prior to make Bayesian inference on the future failure process of a generic system belonging to the same population and employed in an urban or suburban route under randomly chosen working conditions.
Year
DOI
Venue
2014
10.1016/j.ress.2014.04.009
Reliability Engineering & System Safety
Keywords
DocType
Volume
Repairable systems,Power-law process,Heterogeneity,Bayes inference,Powertrain systems
Journal
131
ISSN
Citations 
PageRank 
0951-8320
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Massimiliano Giorgio1104.66
Maurizio Guida2528.83
Gianpaolo Pulcini35911.19