On analysing warranty data from repairable items

Marshall, Sarah and Chukova, Stefanka (2010) On analysing warranty data from repairable items. Quality and Reliability Engineering International, 26 (1). 43–52. ISSN 0748-8017

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Fitting models to failure data is an important topic in reliability. The resulting models can be useful both for manufacturers as well as for end-users. In this paper we provide details of some methods from the literature which can be used as a starting point when analysing and fitting models to failure data from repairable items. In particular we focus on obtaining analytical estimates of the intensity of a non-homogeneous Poisson process. We illustrate some of these methods on failure data from the warranty database of a major car manufacturer.