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Reliability evaluation and optimisation of imperfect inspections for a component with multi-defects


Zhao, J and Chan, AHC and Roberts, C and Madelin, KB, Reliability evaluation and optimisation of imperfect inspections for a component with multi-defects, Reliability Engineering and System Safety, 92 pp. 65-73. ISSN 0951-8320 (2007) [Refereed Article]

Copyright Statement

copyright 2005 Elsevier

DOI: doi:10.1016/j.ress.2005.11.003


In this paper, a model is developed to evaluate the reliability and optimise the inspection schedule for a multi-defect component. The model uses a non-homogeneous Poisson process (NHPP) method in conjunction with a delay time approach. The inspections are designed to detect any defects in the component, however it can be imperfect. The defect is a definable state before a functional failure happens to the component. Occurrences of defects are assumed to follow an NHPP and a defect will be minimally repaired if it is identified during an inspection. It is shown that the failures occurring in an interval of inspection will also follow an NHPP. The situation of imperfect inspections and non-constant inspection intervals are considered. An algorithm is presented to optimise the intervals of inspections in order to maximise the reliability of the component, and the properties of the algorithm are shown. A numerical example with parametric study is given to show the performance of the model and the algorithm.

Item Details

Item Type:Refereed Article
Keywords:reliability, defect, failure, imperfect inspection, optimisation
Research Division:Engineering
Research Group:Civil engineering
Research Field:Civil geotechnical engineering
Objective Division:Construction
Objective Group:Construction design
Objective Field:Civil construction design
UTAS Author:Chan, AHC (Professor Andrew Chan)
ID Code:109972
Year Published:2007
Web of Science® Times Cited:46
Deposited By:Office of the School of Engineering
Deposited On:2016-07-09
Last Modified:2016-09-20

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