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1、1.1Philips FMEA Failure Mode and Effect Analysis1.2Content of the coursevIntroductionvProduct-FMEAvBlockdiagram,functiontree vProcess-FMEAvProcess-flowdiagram(macro-level),micro-levelvFacilitatorskills1.3FMEA IntroductionvWhy FMEAs?vDefinition,Purpose,Types,BenefitsvTeam ApproachFMEA-PhilipsIntroduc

2、tion1.4Why FMEAs?vAppropriate recommended actions may not have been taken.vSavings in engineering time.vReduction of changes immediately before productionstart(Commercial Release).1.5FMEA DefinitionvIdentify potential failure modesvPrioritize actionsvDocument the process.Structured group of activiti

3、es which.1.6FMEA PurposeFailuresTimeC R(Productionstart)FMEA1.7vRate severity of failure modesvIdentify actions to reduce occurencevTest adequacy of controlsFMEA PurposeFMEAs are intended to.1.8FMEA Types OpticalProduct-FMEA MechanicalProcess-FMEA Electrical MechanicalElectricalOptical1.9FMEA Sessio

4、nsFMEA onEVT ModelFMEA onFirst MechanicalWorking ModelFMEA onPart FilesFMEA onL1 Board(ftbo L2)FMEA onL0 Board(ftbo L1)FMEA onL0 Schematics(ftbo L0)FMEA onArchitecturesMechanicalElectricalFMEA onchosenArchitecture1.10Benefits Product-FMEAsvAssess failure mode effects on all customers.vAids in evalua

5、ting testspecificationsvEvaluation of design relating to DFM DFA DFT vIncreases the possibility to detect possible failure modes.ProcesProduct1.11Voordelen Proces-FMEAsvAssess effects on all customersvIdentifies potential manufacturing and assembly causes to focus controls on reducing occurrence or

6、increasing detection.DesignProces1.12Generating FMEAs FMEAsWho initiates?Failure Mode and Effect AnalysisWho updates?Who is FMEA-customer?Startingdate/revisiondate?When completed?How docu-mented?When to discard?Who prepares?1.13Managing FMEAs vModification to a product or process is plannedvComponen

7、t is to be used in new environmentvCustomer rejectionsFMEAs are living documents and are updated.1.14FMEA Team ApproachCore-teamSupport-team1.15Product-FMEA ContentvDefine FMEA-team vDefine scopevDescribe functionsBrainstormingFunction TreesPhilipsProduct-FMEA Content1.16Product-FMEA TeamDesign-Engi

8、nieerProduction/process-enginieerCore-team Representitives from:developmentproductionqualitypurchasetestdept.SupportteamFacilitator1.17Product-FMEA ScopevCreate BlockdiagramvIdentify the boundery for AnalysisvConfirm composition of support team.Once coreteam is established.1.18BlockdiagramComponent/

9、AssemblyPart XPart YPart ZServiceOther systemsAssemblyUserScrewWeldAdhesive1.19Example blockdiagram(Settop Wildfire)FrontKlickedDisplay PCBPSUSmartcard PCBFrameCoverKlickedKlickedScrewedScrewed1.20Determine FunctionsvDescribes the intent of the designvMust be measureble or set at an actionable level

10、vRepresents all wants,both spoken and unspoken.What are the functions of the design?1.21VerbIndicates action,occurrence,beingGenerateControlDisplayNounIndicates what the action relates toDescribe Functionlightspeedinformation1.22Describe FunctionsThought starters.vSatisfy uservAttract uservGuarantee

11、 durabilityvEasy to reparevSafety requirements1.23Brainstorming1.24Functiontree vProvides an organized approach to identify the essential features of a productvDefines all spoken and unspoken requirementsvProvides the team with a clear overview of all the functions of the product.1.25FirstlevelSecon

12、dLevelConstructing FunctiontreesThirdLevelHOW?WHY?1.26DisplayInformationFunctiontree Frontbutton(Settop)HOW?Must be printable and resistance te wear.PQR-Cleantest.Tekst clearly visibleafter x-times cleaning.WHY?1.27GuidelinesvBrainstorm all functions(VERB-NOUN)vDocument individual functions by askin

13、g“How is this function achieved?”vRepeat left to right,until actionable levelvWork right to left and check structure by asking“Why is this function included?”1.28Product-FMEA FunctionsDescriptionLevel 1DescriptionLevel 2FunctionMode of FailureEffectCauseAction/SolutionResp.FrontButtonTekst clear vis

14、ible afterPQR-testMCMLP1.29Potential failure ModesNo functionPartial function Failure Mode TypeExampleNot operationalNot all of function operating1.30Failure Modes:FrontbuttonNo function No tekst availablePartial function Tekst partial availableFunction:Tekst clear visible after 100 x cleaning.Failu

15、re Mode Type Example1.31Product-FMEA Modes of failureDescriptionLevel 1DescriptionLevel 2FunctionMode of FailureEffectCauseAction/SolutionResp.FrontButtonTekst clear visible after PQR-testTekst unread-ableMCMLP1.32Effects failureWhat are the effects of the failure relating to:-another part-the compl

16、ete assembly-the customer-the enduser-the governmental regulations1.33Product-FMEA Tabel of effectsFailureModeTekstunread-ableFrontbuttonCompleteAssemblyDifficultto saleCustomerDissatisfiedEnduserDissatisfiedGovernmental regulationNoneAnotherpartNone1.34Product-FMEA Effects of failureDescriptionLevel 1DescriptionLevel 2FunctionMode of FailureEffectCauseAction/SolutionResp.FrontButtonTekst clear visible after PQR-testTekst unread-ableMCMLPAssembly not possible to saleCustomerdissatisfied1.35Sever