a system requirements traceability model an industrial application

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1、ASystemRequirementsTraceabilityModel:AnIndustrialApplicationTrevorCockram,RegParker,DavidTiley,HelenWoodwardRolls-RoyceMAELJaneSmith,AndyVickersUniversityofYorkRolls-RoyceUTCAbstractSystemsrequirementstraceabilityisanessentialdisciplineinthedevelopmentoflargereal-timesafetycriticalsystems.Thecor

2、rectcaptureandutilisationoftraceabilityinformationisnecessarytosupportverificationandcertification,andfundamentaltochangemanagement.Therequirementsforsystemsareatanumberoflevelsofabstractionderivedthroughsuccessivedecompositionofthesystemunderdevelopment.Accordingly,theassociatedrequirementstrac

3、eabilityisequallycomplex.Anadditionaldimensionistheneedtoencapsulatetherationalefortherequirementsanditsdesign(anessentialelementofthesafetycase)withinthetraceabilitystructure,andtheneedtorecordarangeofattributestosupporttherequirementssuchasrequirementriskandstability.Atraceabilitymodeladdressi

4、ngallthesedimensionsofcomplexityhasbeendeveloped.Thisidentifiestherequirementtorequirementtraceability,aswellasrequirementstodesigntraceability.Thestructureisthenusedtoorganiseanddefinethedesignrationaleandrequirementattributes.Thetraceabilitymodelalsoaddressestheneedtocapturerequirementsinarang

5、eofformatsincludingtextual,pictorialandtabularwithlinkstoformalspecificationswhereappropriate.Animplementationofthismodeliscurrentlybeingusedtosupportthedevelopmentworkonanumberofaeroengineprojects.1INTRODUCTIONTheabilitytotracethelogicalandphysicallinksbetweenthedifferentlevelsofsystemrequireme

6、ntsisanessentialdisciplineinthedevelopmentoflargereal-timesafetycriticalsystems.Thecompletenessoftheverificationofthesystems44F.Redmilletal.(eds.),IndustrialPerspectivesofSafety-criticalSystems©Springer-VerlagLondonLimited199845requirementsandarecordofthesystemsdevelopmentprocessisnecessarytoobt

7、aincertification,andisfundamentaltoeffectivechangemanagement.Variousproprietarycomputertoolshavebeenusedbyprojectsforstoringanddocumentingsystemsrequirementswithdetailsoftheirattributesandtraceabilitybetweenlevelsofdecomposi