On ageing concepts for repairable items from heterogeneous populations

Ji Hwan Cha; Maxim Finkelstein

doi:10.1109/TR.2016.2570563

On ageing concepts for repairable items from heterogeneous populations

Ji Hwan Cha, Maxim Finkelstein

Department of Statistics

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Ageing concepts are very important in lifetime modeling and analysis. Monotonic failure rates are the simplest and most popular manifestations of aging properties of items in applications (IFR and DFR, accordingly). However, they are usually discussed for homogeneous populations, whereas heterogeneity can change dramatically the shape of the corresponding failure rate. In this paper, we suggest a new measure of ageing for items from heterogeneous populations based on the described process of information-based minimal repairs. We also show and illustrate, by several examples, that the conventional measure of aging based on the shape of the (population) failure rate is unrealistic in this case and can lead to wrong decisions, e.g., in burn-in procedures and optimal maintenance.

Original language	English
Article number	7494978
Pages (from-to)	1864-1870
Number of pages	7
Journal	IEEE Transactions on Reliability
Volume	65
Issue number	4
DOIs	https://doi.org/10.1109/TR.2016.2570563
State	Published - Dec 2016

Bibliographical note

Publisher Copyright:
© 1963-2012 IEEE.

Keywords

Ageing
information-based minimal repair
population failure rate
statistical minimal repair

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10.1109/TR.2016.2570563

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On ageing concepts for repairable items from heterogeneous populations

Abstract

Bibliographical note

Keywords

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