FMEA-ms

1FailureModeandEffectAnalysis(FMEA)失效模式和效果分析ProcessStep/PartNumberPotentialFailureModePotentialFailureEffectsSEVPotentialCausesOCCCurrentControlsDETRPNActionsRecommendedResp.COATING&IMAGINGDIRTYPHOTOMASKMICROCRACKING,DELAMINATION,STREAKS8LOWFREQUENCYOFCLEANING8SOP,VISUALINSPECTION7448INCREASEFREQUENCYTOONCEEVERY20PANELSMGIMPROVECLEANINGMETHODPFPURCHASEOFF-LINECLEANINGSYSTEMMGTESTON-LINEMASKREPLACEMENTPF3DefinitionofFMEAFMEA定义(I)FMEA:FailureModeandEffectsAnalysisFMEA：失效模式和效果分析Aprocedureinwhicheachpotentialfailuremodeineverysub-itemofanitemisanalyzedtodetermineitseffectonothersub-itemsandontherequiredfunctionoftheitem.FMEA是一个过程，在这个过程中对每个分项目的潜在失效模式进行分析，确定失效模式对于其他分项目和主项目的功能的影响Takenfrom“TheCertifiedQualityEngineerHandbook”ASQ4DefinitionofFMEAFMEA定义(II)FMEA:FailureModeandEffectsAnalysisFMEA：失效模式和效果分析FMEAisastructuredanalysistoanticipatethepotentialfailuresofadesignorprocessbeforetheyoccur.Allaspectsofeachpotentialfailurearestudiedtoidentifythemosteffectivepreventiveactions.FMEA是结构化的分析方法。用它在设计或过程的失效模式发生之前就预见潜在的失效.然后全面分析失效的各方面并识别最有效的预防措施.6DefinitionofFMEAFMEA定义1.Identifyandevaluatethepotentialfailuremodesofaproduct/processandtheeffectsofthatfailure识别和评估一个产品或过程的潜在失效模式及其影响；2.Listdowntheactionswhichcouldeliminateorreducethechanceofthepotentialfailureoccurring确定能排除或减少潜在失效发生的机率的措施；3.Documentalltheelementsforreviewandaction文件化整个过程。AnFMEAcanbedescribedasasystematicgroupofactivitiesintendedto:FMEA是一系列系统化的活动，其目的是：7PropertiesofFMEAFMEA的特点FMEAbeginswithadefinitionofallthefunctionsaprocessissupposedtoperform.FMEA开始于一个过程所有功能的定义ManufacturingEngineer制造工程师SupplierQuality供应商质量DesignEngineer设计工程师ProgramManagement程序管理Production产品ReliabilityEngineer可靠性工程师8Teamwork团队力量FMEAmustbeperformedbyateaminordertoensureitseffectivenessFMEA须由小组进行,以确保其有效PropertiesofFMEAFMEA的特点9ThePurposeofFMEAFMEA的目的Toidentifypotentialfailuremodesandratetheseverityoftheireffects识别潜在失效模式并评估他们影响的严重性Toidentifycriticalcharacteristicsandsignificantcharacteristics识别关键特性和重要特性10Torankpotentialdesignandprocessdeficiencies评估潜在的设计和工序不足Reducetheproductdevelopmentcycle-timeandhencecost减少产品开发时间和成本Tofocusoneliminatingandpreventingproductandprocessproblems聚焦于产品和工序问题的消除，并防止问题再次发生ThePurposeofFMEAFMEA的目的11Background背景Bylate80’s,FMEAisusedbyautomotivemanufacturersandtheirsupplierstoreducetheliabilitycost.到80年代末，汽车工业和他们的供货商也开始实施FMEA，藉此减低责任成本Developedinearly60’sbyNASAto“fail-proof”Apollomissions.60年代初，由美国太空空署在阿波罗任务中发展起来的。Adoptedinearly70’sbyUSNavytodevelopMIL-STD-1629.70年代初，被美国海军采用。12TypesofFMEAFMEA的类型Itiswidelyusedinbothmanufacturingandtransactionalareas在制造和服务流程中都可以使用SYSTEM系统FMEASystemFMEAisusedtoanalyzesystemsandsubsystemsintheearlyconceptualdesignstages.SFMEA是用来在早期构思设计阶段分析系统与子系统DESIGN设计FMEADesignFMEAisusedtoanalyzeproductsbeforetheyarereleasedtoproductionDFMEA是用来在生产发布前分析产品。PROCESS过程FMEAProcessFMEAisusedtoanalyzemanufacturing,assemblyandadministrativeprocessesPFMEA用来分析制造、装配和管理过程13WhenShouldWeImplementFMEA?应在什么时候实施FMEA？WeShouldStartFMEA我们应开始FMEAASEARLYASPOSSIBLE越早越好！15ProcessFMEAFormat过程FMEA格式PRODUCT:FMEANO.PROCESSFMEAPRODUCT:PAGEOFPRODUCT:DATE:BY:OklahomaCityPROCESSDESCRIPTIONPOTENTIALPOTENTIALSPOTENTIALOCURRENTDRPNACTIONCORRECTIVERESPONSIBILITYACTIONRESULTINGFAILUREMODEEFFECTSOFCAUSE(S)OFCONTROLSPRIORITYACTION&DATEDUETAKENFUNCTIONFAILUREFAILURESODRPNDETECTIONOCCURRENCESEVERITYRPN=SxOxD16PFMEA图表产品：:FMEA编号：过程FMEA过程/操作；第页共页计划编制参考：:日期：编制：城市过程描述潜在失效模式S潜在失效的起因O现行控制DRPN优先措施责任人和完成日期采取的措施措施结果潜在失效后果功能SODRPN探测度频度数严重度RPN=SxOxD纠正措施17ProcessFailureMode过程失效模式Itisthemannerinwhichtheprocesscouldfailtoperformitsintendedfunction.潜在失效模式是过程可能发生的不满足其原有功能的形式Thefailuremodeofaparticularprocessstepcouldbeacausetoasubsequentsteporaneffectofthefailureinapreviousoperation.某一工序的失效模式可能是后续操作（下道工序）的起因，或前期操作（前道工序）相关的潜在失效的后果。19PotentialCauses潜在原因ProcessFMEAconsidersprocessvariabilitydueto:5M+E过程FMEA考虑是由于如下原因造成的过程变异性:5M+EMACHINE机器ENVIRONMENT环境MEASUREMENT测量MAN人员METHOD方法MATERIAL物料23ScoringCategories评分类别Scoresareassignedtothefollowing3categories:对以下3类进行评分：SEVERITY(S)严重度Theseriousnessofthepotentialfailuremodetothecustomer.Thecustomerincludeslocalsystem,nextlevelandenduser.Severityappliestotheeffectonly.潜在失效模式对客户的严重度。这里所指的客户包括系统，下个工序和最终用户。严重度只适用于结果OCCURRENCE(O)发生频率Howfrequentaspecificcausewilloccurandresultinaspecificfailuremode.Theoccurrencerankingnumberhasameaningratherthanavalue.造成某种失效模式的某个原因多长时间发生一次。发生频率的重点并不在于它的得分，而是它的意义DETECTION(D)可探测度Probabilityofthecurrent/proposedcontrolmechanismtodetectandidentifythefailuremode是指当前或将要用来探测或鉴别失效模式的控制设备能多探测出失效模式的概率24RiskPriorityNumber风险优先指数RPN=OxSxD/EWhere:其中O--Occurrencex发生频率S--Severityx严重性D--Detection可探测性orE–Effectiveness有效性25ShortcomingsofRPNRPN的缺点A845160B485160SAMERESULT!相同的结果FailureMode失效模式S严重度O发生频度D/E有效性RPN风险优先指数26ActionPriority措施优先级别ABCDOver200100-19926-991-25PRIORITY优先级别RPNRANGERPN范围Thisisforreferenceonly仅供参考28HowIsFMEAAppliedinSixSigmaFMEA在6Sigma中的运用FMEAinputistheprocessflowchartFMEA的输入是流程图。Input输入ProcessFlowchart流程图Process过程FMEAOutput输出HighPriorityFailureModes&CausesofFailure高优先级失效模式及失效原因FMEAisananalyticalprocess.FMEA是一个分析的过程。FMEAoutputisprioritizedkeyprocessinputvari