FailureModeandEffectAnalysis(FMEA)-EasternIllinois失效模式与影响分析（FMEA）-伊利诺斯东部

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1、FailureMode&EffectAnalysisTomHannan&KevinKowalisEasternIllinoisUniversitySchoolofTechnologyTotalQualitySystemsINT5133(FMEA)WhatisFMEA?“Isananalyticaltechniquethatcombinesthetechnologyandexperienceofpeopleinidentifyingforeseeablefailuremodesofaproductorprocessandplanning

2、foritselimination.”()Before-The-EventactionthatmakesiteasiertofindflawsinthesystemORReliabilityIstheprobabilityoftheproducttoperformasexpectedforacertainperiodoftime,underthegivenoperatingconditions,andatagivensetofproductperformancecharacteristics.ReliabilityRequiremen

3、tsBasedonthedefinitionofthepart,assembly,orprocessunderconsideration,thereliabilityofeachsub-systemandthefactorsinvolvedinthereliabilitymustbefound,andtheappropriaterelationshipsforeachpart,class,ormoduleoftheproductmustbecomputed.FailureRatePeriodsoffailurecanconvenien

4、tlybemodeledbyanexponentialdistribution,andtheprobabilityofsurvivaloftheproductorprocessmaybeviewedas:Rt=e^(-T*F)=e^-(T/o)Rt=theperiodofoperationwithoutfailureT=timespecifiedforoperationw/ofailureF=FailurerateO=themeantimetofailureIntentofFMEAAnEssentialPartofTotalQuali

5、tyManagementisFMEA!ProvidesTrainingTrackstheprogressofaprojectHelpscommunicatingsimilarproblemsUncoversoversights,misjudgments,anderrorsCalculatetheprobabilitiesoffailuresDetermineifproductorprocessfailureeffectsonotheraspects.FMEATeamFMEAmethodologyisateameffortwhereth

6、eresponsibleengineerinvolveswho?AssemblyManufacturingMaterialsQualityServiceSupplierCustomerFMEADocumentationBlockDiagramDesignorProcessIntentTheCustomerNeedsandWantsTheFMEAFormClassAssignment!!!!!!Divideupintofourgroups(N,S,EandW)ChangeTireFlashlightUnicycleBicycleMake

7、ASimpleBlockDiagramStagesofFMEAQuantifyingRiskCorrectingHighRiskCausesSpecifyingPossibilitiesRe-evaluationofRiskSpecifyingPossibilitiesFunctionsPossibleFailureModesRootCausesEffectsDetection/PreventionQuantifyingRiskProbabilityofCauseSeverityofEffectEffectivenessofContr

8、oltoPreventCauseRiskPriorityNumberCorrectingHighRiskCausesPrioritizingWorkDetailingActionAssigningActionRespon