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On Ageing Concepts for Repairable Items From Heterogeneous Populations

Title
On Ageing Concepts for Repairable Items From Heterogeneous Populations
Authors
Cha, Ji HwanFinkelstein, Maxim
Ewha Authors
차지환
SCOPUS Author ID
차지환scopus
Issue Date
2016
Journal Title
IEEE TRANSACTIONS ON RELIABILITY
ISSN
0018-9529JCR Link1558-1721JCR Link
Citation
vol. 65, no. 4, pp. 1864 - 1870
Keywords
Ageinginformation-based minimal repairpopulation failure ratestatistical minimal repair
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Indexed
SCIE; SCOPUS WOS scopus
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.
DOI
10.1109/TR.2016.2570563
Appears in Collections:
자연과학대학 > 통계학전공 > Journal papers
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