FMEA潜在失效模式及后果分析(英文版)(ppt 74页).pptx
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FMEA潜在失效模式及后果分析(英文版)(ppt 74页).pptx
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1.1PhilipsFMEAFailureModeandEffectAnalysis1.2ContentofthecoursevIntroductionvProduct-FMEAvBlockdiagram,functiontreevProcess-FMEAvProcess-flowdiagram(macro-level),micro-levelvFacilitatorskills1.3FMEAIntroductionvWhyFMEAs?
vDefinition,Purpose,Types,BenefitsvTeamApproachFMEA-PhilipsIntroduction1.4WhyFMEAs?
vAppropriaterecommendedactionsmaynothavebeentaken.vSavingsinengineeringtime.vReductionofchangesimmediatelybeforeproductionstart(CommercialRelease).1.5FMEADefinitionvIdentifypotentialfailuremodesvPrioritizeactionsvDocumenttheprocess.Structuredgroupofactivitieswhich.1.6FMEAPurposeFailuresTimeCR(Productionstart)FMEA1.7vRateseverityoffailuremodesvIdentifyactionstoreduceoccurencevTestadequacyofcontrolsFMEAPurposeFMEAsareintendedto.1.8FMEATypesOpticalProduct-FMEAMechanicalProcess-FMEAElectricalMechanicalElectricalOptical1.9FMEASessionsFMEAonEVTModelFMEAonFirstMechanicalWorkingModelFMEAonPartFilesFMEAonL1Board(ftboL2)FMEAonL0Board(ftboL1)FMEAonL0Schematics(ftboL0)FMEAonArchitecturesMechanicalElectricalFMEAonchosenArchitecture1.10BenefitsProduct-FMEAsvAssessfailuremodeeffectsonallcustomers.vAidsinevaluatingtestspecificationsvEvaluationofdesignrelatingtoDFMDFADFTvIncreasesthepossibilitytodetectpossiblefailuremodes.ProcesProduct1.11VoordelenProces-FMEAsvAssesseffectsonallcustomersvIdentifiespotentialmanufacturingandassemblycausestofocuscontrolsonreducingoccurrenceorincreasingdetection.DesignProces1.12GeneratingFMEAsFMEAsWhoinitiates?
FailureModeandEffectAnalysisWhoupdates?
WhoisFMEA-customer?
Startingdate/revisiondate?
Whencompleted?
Howdocu-mented?
Whentodiscard?
Whoprepares?
1.13ManagingFMEAsvModificationtoaproductorprocessisplannedvComponentistobeusedinnewenvironmentvCustomerrejectionsFMEAsarelivingdocumentsandareupdated.1.14FMEATeamApproachCore-teamSupport-team1.15Product-FMEAContentvDefineFMEA-teamvDefinescopevDescribefunctionsBrainstormingFunctionTreesPhilipsProduct-FMEAContent1.16Product-FMEATeamDesign-EnginieerProduction/process-enginieerCore-teamRepresentitivesfrom:
developmentproductionqualitypurchasetestdept.SupportteamFacilitator1.17Product-FMEAScopevCreateBlockdiagramvIdentifythebounderyforAnalysisvConfirmcompositionofsupportteam.Oncecoreteamisestablished.1.18BlockdiagramComponent/AssemblyPartXPartYPartZServiceOthersystemsAssemblyUserScrewWeldAdhesive1.19Exampleblockdiagram(SettopWildfire)FrontKlickedDisplayPCBPSUSmartcardPCBFrameCoverKlickedKlickedScrewedScrewed1.20DetermineFunctionsvDescribestheintentofthedesignvMustbemeasurebleorsetatanactionablelevelvRepresentsallwants,bothspokenandunspoken.Whatarethefunctionsofthedesign?
1.21VerbIndicatesaction,occurrence,beingGenerateControlDisplayNounIndicateswhattheactionrelatestoDescribeFunctionlightspeedinformation1.22DescribeFunctionsThoughtstarters.vSatisfyuservAttractuservGuaranteedurabilityvEasytoreparevSafetyrequirements1.23Brainstorming1.24FunctiontreevProvidesanorganizedapproachtoidentifytheessentialfeaturesofaproductvDefinesallspokenandunspokenrequirementsvProvidestheteamwithaclearoverviewofallthefunctionsoftheproduct.1.25FirstlevelSecondLevelConstructingFunctiontreesThirdLevelHOW?
WHY?
1.26DisplayInformationFunctiontreeFrontbutton(Settop)HOW?
Mustbeprintableandresistancetewear.PQR-Cleantest.Tekstclearlyvisibleafterx-timescleaning.WHY?
1.27GuidelinesvBrainstormallfunctions(VERB-NOUN)vDocumentindividualfunctionsbyasking“Howisthisfunctionachieved?
”vRepeatlefttoright,untilactionablelevelvWorkrighttoleftandcheckstructurebyasking“Whyisthisfunctionincluded?
”1.28Product-FMEAFunctionsDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testMCMLP1.29PotentialfailureModesNofunctionPartialfunctionFailureModeTypeExampleNotoperationalNotalloffunctionoperating1.30FailureModes:
FrontbuttonNofunctionNotekstavailablePartialfunctionTekstpartialavailableFunction:
Tekstclearvisibleafter100xcleaning.FailureModeTypeExample1.31Product-FMEAModesoffailureDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLP1.32EffectsfailureWhataretheeffectsofthefailurerelatingto:
-anotherpart-thecompleteassembly-thecustomer-theenduser-thegovernmentalregulations1.33Product-FMEATabelofeffectsFailureModeTekstunread-ableFrontbuttonCompleteAssemblyDifficulttosaleCustomerDissatisfiedEnduserDissatisfiedGovernmentalregulationNoneAnotherpartNone1.34Product-FMEAEffectsoffailureDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLPAssemblynotpossibletosaleCustomerdissatisfied1.35Severity(Weightfactor)Whatistheseverityoftheeffects?
1.36Criteria:
SeverityofeffectClassEffectAcceptedfailureDNoneSafetyfailureSUnacceptableriskNon-conformingwithsafetyCorrectionisnescessaryARelativebigriskCorrectieisrecommendedBrisicoCorrectieisnuttigCRatingcriteriavoorSeverity(Weightfactor)MinimumriskCorrectieisusefullC1.37Frontbutton/TekstreadableafterPQR-testFailureModeTekstunreadableEffectsAssembly:
unsaleable(A)Customer:
Dissatisfied(A)Gov.Reg.:
None(D)ARatingofWeightfactorexampleSev.PartFunction1.38Product-FMEAWeightfactorDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLPAssemblynotpossibletosaleCustomerdissatisfiedA1.39PotentialCauseofFailureAweaknessinthedesignwithafailuremodeaseffect.1.40ManufacturingmisbuildsDuetodesignDeficiencies+-+-1.41ManufacturingmisbuildsRobustDesign+-+-1.42UseFishboneDiagramCauseoffailureTekstunreadableInktofpoorqualityTekstonwronglocation1.43Causeoffailure“Why”-ladderDesignrequirementWHY?
level1TekstunreadableWHY?
level2WHY?
level3InktdoesntstickSurfaceroughnessnotok.1.44SentencingTechniqueFailureModeCouldresultinEffectDuetoCause1.45SentencingTechnique-ExampleTekstunreadableCouldresultinDissatisfiedcustomerDuetoSurfaceroughness(designreq.)1.46Product-FMEACauseDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLPAssemblynotpossibletosaleCustomerdissatisfiedATekstonwronglocation1.47Product-FMEAOccurrenceWhatisthepossibilitythatthefailureoccurrs?
1.48PossibleFailureRatesRankingProbabilityoffailure1of20VeryhighModerate1of4001of15000Low1of1500045321Ratingcriteriaoccurrence1of31.49Product-FMEAOccurrenceDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLPAssemblynotpossibletosaleCustomerdissatisfiedATekstonwronglocation51.50Produkt-FMEAAction/SolutionWhatarepossibleactionsto:
-eliminatethefailure-reduceeffect-reduceoccurrence.1.51Product-FMEAAction/SolutionDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLPAssemblynotpossibletosaleCustomerdissatisfiedATekstonwronglocation5NotekstonbuttonsJD1.52DefineEvolutionfactorvCausenotknown4vSolutionnotknown3vSolutionnotevaluated2vSolutionnotimplemented1vSolutionimplemented01.53Product-FMEAEvolutionfactorDescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.FrontButtonTekstclearvisibleafterPQR-testTekstunread-ableMCMLPAssemblynotpossibletosaleCustomerdissatisfiedATekstonwronglocation5NotekstonbuttonsJD11.54RiskevaluationvSeverity(Weightfactor)vOccurrencevEvolutionfactorvRiskmaturity-grid1.55MaturityGridWeightFactorEvolutionFactorEvolutionFactorSABCD0123401234375451231.56Product-FMEAElectrical(Example)DescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.PFrontendTunerPut-throughselectedsignal(SD12XX)Tunergetsdisturbedbynoisegeneratedby14-18VgenerationTunergivesbadsignalthroughALowfrequentnoiseisnotfiltered5MLMCAddbeadinLNBAline,rightnexttotunerGD21.57Proces-FMEAContentvFMEA-teamvDefinescopevDescribefunctionsPhilipsProces-FMEAContent1.58Proces-FMEATeamProduction/-process-engineerDesign-engineerCore-teamRepresentativesof:
ProductdevelopmentProcess-developmentProductionQualityPurchaseOwnerofthenextprocess.Support-teamFacilitatororapplicationengineer1.59Process-FMEAScopevCreateflow-diagramvDefinescopevDefinesupport-team.1.60Process-FMEA(Example)DescriptionLevel1DescriptionLevel2FunctionModeofFailureEffectCauseAction/SolutionResp.PGlueGluewithcyano-acrylateJoinpartsCyanoacrylatenotwellcuredLifetimeproblemsAGluevolumetohigh5MLMCUseactivatorJD21.61FMEATasks&Responsibilities.1.62FMEATeamleadervPreparationoftheFMEA-sessiondistributionoftheproducttotheparticipants1or2weeksbeforethemeetingtogatheralltherelevantinformation.Prepare(fill-in)FMEA-worksheetasgoodaspossible(functions,failuremodes,.)Tasksoftheteamleader:
1.63FMEATeamleadervPreparationoftheFMEA-session:
Distribute/displayimportantinformation:
agenda,FMEA-methodDefinetasksoftheteam-members:
Whoistheteamleader,facilitator,timekeeper,secretary?
Tasksoftheteamleader:
1.64FMEAFacilitatorvHelpspreparingtheFMEA-sessionvSupportstheteamleadervTakescarethatFMEA-metholodgyiscorrectlyusedvTakescareoftheteam-process.Tasksofthefacilitator:
1.65FMEAFacilitatorvPreparationoftheFMEA-sessionpreparationtogetherwiththeteam-leaderdefineagendaforthemeetingproduct-FMEA:
createblockdiagramprocess-FMEA:
createflowdiagramdefi
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