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AuthorLiu, X.
AuthorAl-Khalifa, K.N.
AuthorElsayed, E.A.
AuthorCoit, D.W.
AuthorHamouda, A.S.
Available date2016-02-08T14:21:26Z
Publication Date2014
Publication NameIIE Transactions (Institute of Industrial Engineers)
CitationLiu, X., Al-Khalifa, K.N., Elsayed, E.A., Coit, D.W., Hamouda, A.S. "Criticality measures for components with multi-dimensional degradation." (2014) IIE Transactions (Institute of Industrial Engineers), 46 (10), pp. 987-998.
AbstractFailures of engineering structures and equipment are often attributed to the failure of a single component. Hence, it is important to identify critical components in a system and understand how a component's criticality changes over time under dynamic environments. This article investigates the criticality analysis for components with multiple competing failure modes due to degradation. The component degradation is modeled as a k-dimensional Wiener process. A component fails when any of the k degradation processes associated with that component attains a certain threshold level. Motivated by Nelson's cumulative exposure model, a relationship between both the mean and diffusion of the degradation process and environmental conditions is established. Expressions of a component's criticality measures are derived. Numerical examples are presented to illustrate the criticality analysis.
SponsorNPRP 09-774-2-297 from the Qatar National Research Fund.
PublisherTaylor and Francis Ltd.
SubjectBrownian motion
SubjectComponent criticality
Subjectdynamic environments
Subjectimportance measures
TitleCriticality measures for components with multi-dimensional degradation
Issue Number10
Volume Number46

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