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Download fileImportance measures for non-coherent-system analysis
journal contribution
posted on 2008-10-24, 12:19 authored by Sally C. Beeson, J.D. AndrewsComponent importance analysis is a key part of the
system reliability quantification process. It enables the weakest
areas of a system to be identified and indicates modifications,
which will improve the system reliability. Although a wide range of
importance measures have been developed, the majority of these
measures are strictly for coherent system analysis. Non-coherent
systems can occur and accurate importance analysis is essential.
This paper extends four commonly used measures of importance,
using the noncoherent extension of Birnbaum’s measure of
component reliability importance. Since both component failure
and repair can contribute to system failure in a noncoherent
system, both of these influences need to be considered. This paper
highlights that it is crucial to choose appropriate measures to
analyze component importance. First the aims of the analysis
must be outlined and then the roles that component failures and
repairs can play in system state deterioration can be considered.
For example, the failure/repair of components in safety systems
can play only a passive role in system failure, since it is usually
inactive, hence measures that consider initiator importance are
not appropriate to analyze the importance of these components.
Measures of importance must be chosen carefully to ensure
analysis is meaningful and useful conclusions can be drawn.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
BEESON, S. and ANDREWS, J.D., 2003. Importance measures for non-coherent-system analysis. IEEE Transactions on Reliability, 52(3), pp 301-310Publisher
© IEEEPublication date
2003Notes
This is a journal article. It was published in the journal, IEEE Transactions on Reliability [© IEEE] and the definitive version is also available at: http://ieeexplore.ieee.org. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.ISSN
0018-9529Language
- en