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dc.contributor.authorZhang, Aibo
dc.contributor.authorZhang, Tieling
dc.contributor.authorBarros, Anne
dc.contributor.authorLiu, Yiliu
dc.date.accessioned2020-01-13T09:46:46Z
dc.date.available2020-01-13T09:46:46Z
dc.date.created2020-01-07T10:48:25Z
dc.date.issued2020
dc.identifier.citationReliability Engineering & System Safety. 2020, 196 .nb_NO
dc.identifier.issn0951-8320
dc.identifier.urihttp://hdl.handle.net/11250/2635880
dc.description.abstractSafety-instrumented systems (SISs) have been widely installed to prevent accidental events and mitigate their consequences. Mechanical final elements of SISs often become vulnerable with time due to degradations, but the particulars in SIS operations and assessment impede the adaption of state-of-art research results on maintenances into this domain. This paper models the degradation of SIS final element as a stochastic process. Based on the observed information during a proof test, it is essential to determine an optimal maintenance strategy by choosing a preventive maintenance (PM) or corrective maintenance (CM), as well deciding what degree of mitigation of degradation is enough in case of a PM. When the reasonable initiation situation of a PM and the optimal maintenance degree are identified, lifetime cost of the final element can be minimized while keeping satisfying the integrity level requirement for the SIS. A numerical example is introduced to illustrate how the presenting methods are used to examine the effects of maintenance strategies on cost and the average probability of failure on demands (PFDavg) of a SIS. Intervals of the upcoming tests thus can be updated to provide maintenance crews with more clues on cost-effective tests without weakening safety.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleOptimization of maintenances following proof tests for the final element of a safety-instrumented systemnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber10nb_NO
dc.source.volume196nb_NO
dc.source.journalReliability Engineering & System Safetynb_NO
dc.identifier.doi10.1016/j.ress.2019.106779
dc.identifier.cristin1767474
dc.description.localcode© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/BY/4.0/).nb_NO
cristin.unitcode194,64,92,0
cristin.unitnameInstitutt for maskinteknikk og produksjon
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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