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1、ReliabilityEngineeringandSystemSafety66(1999)121±125www.elsevier.com/locate/ressqNewquantitativesafetystandards:differenttechniques,differentresults?J.L.Rouvroye*,A.C.BrombacherFacultyofMechanicalEngineering,EindhovenUniversityofTechnology,POBox513,5600MBEindhoven,TheNetherlandsRe
2、ceived11November1998;accepted13February1999AbstractSafetyInstrumentedSystems(SIS)areusedintheprocessindustrytoperformsafetyfunctions.Manyfactorscanin¯uencethesafetyofaSISlikesystemlayout,diagnostics,testingandrepair.InstandardsliketheGermanDINnoquantitativeanalysisisdemanded(DINV1
3、9250GrundlegendeSicherheitsbetrachtungenfuÈrMSR-Schutzeinrichtungen,Berlin,1994;DIN/VDE0801GrundsaÈtzefuÈrRechnerinSystemenmitSicherheitsaufgaben,Berlin,1990).Theanalysisaccordingtothesestandardsisbasedonexpertopinionandqualitativeanalysistechniques.NewstandardsliketheIEC61508(IEC
4、61508Functionalsafetyofelectrical/electronic/programmableelectronicsafety-relatedsystems,IEC,GeneÁve,1997)andtheISA-S84.01(ISA-S84.01.1996ApplicationofSafetyInstrumentedSystemsfortheProcessIndustries,InstrumentSocietyofAmerica,ResearchTrianglePark,1996)requirequantitativeriskanaly
5、sisbutdonotprescribehowtoperformtheanalysis.Earlierpublicationsoftheauthors(Rouvroyeetal.,Uncertaintyinsafety,newtechniquesfortheassessmentandoptimisationofsafetyinprocessindustry,DW.Pyatt(ed),SERA-Vol.4,Safetyengineeringandriskanalysis,ASME,NewYork1995;Rouvroyeetal.,Acomparisonst
6、udyofqualitativeandquantitativeanalysistechniquesfortheassessmentofsafetyinindustry,P.C.Cacciabue,I.A.Papa-zoglou(eds),ProceedingsPSAMIIIconference,Crete,Greece,June1996)haveshownthatdifferentanalysistechniquescoverdifferentaspectsofsystembehaviour.Thispapershowsbymeansofacasestud
7、y,thatdifferent(quantitative)analysistechniquesmayleadtodifferentresults.Theconsequenceisthattheapplicationofthestandardstopracticalsystemswillnotalwaysleadtounambiguousresults.Theauthorsthereforeproposeatechniquetoovercomethismajordisadvantage.q1999ElsevierScienceLtd.Allrightsres
8、erved.Keywords:IEC61508;Analysist
