6s黑带培训教材1(英文)PPT推荐.ppt

6s黑带培训教材1(英文)PPT推荐.ppt

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ProcessCapabilityAnalysis（MeasurePhase）ProcessCapabilityAnalysisProcessCapabilityAnalysis2ScopeofModuleProcessVariationProcessCapabilitySpecification,ProcessandControlLimitsProcessPotentialvsProcessPerformanceShort-TermvsLong-TermProcessCapabilityProcessCapabilityforNon-NormalDataCycle-Time（ExponentialDistribution）RejectRate（BinomialDistribution）DefectRate（PoissonDistribution）ProcessCapabilityAnalysisProcessCapabilityAnalysis3ProcessVariationProcessVariationistheinevitabledifferencesamongindividualmeasurementsorunitsproducedbyaprocess.SourcesofVariationwithinunit（positionalvariation）betweenunits（unit-unitvariation）betweenlots（lot-lotvariation）betweenlines（line-linevariation）acrosstime（time-timevariation）measurementerror（repeatability&@#@reproducibility）ProcessCapabilityAnalysisProcessCapabilityAnalysis4TypesofVariationInherentorNaturalVariationDuetothecumulativeeffectofmanysmallunavoidablecausesAprocessoperatingwithonlychancecausesofvariationpresentissaidtobe“instatisticalcontrol”ProcessCapabilityAnalysisProcessCapabilityAnalysis5TypesofVariationSpecialorAssignableVariationMaybeduetoa）improperlyadjustedmachineb）operatorerrorc）defectiverawmaterialAprocessoperatinginthepresenceofassignablecausesofvariationissaidtobe“out-of-control”ProcessCapabilityAnalysisProcessCapabilityAnalysis6ProcessCapabilityProcessCapabilityistheinherentreproducibilityofaprocesssoutput.Itmeasureshowwelltheprocessiscurrentlybehavingwithrespecttotheoutputspecifications.Itreferstotheuniformityoftheprocess.Capabilityisoftenthoughtofintermsoftheproportionofoutputthatwillbewithinproductspecificationtolerances.Thefrequencyofdefectivesproducedmaybemeasuredina）percentage（%）b）partspermillion（ppm）c）partsperbillion（ppb）ProcessCapabilityAnalysisProcessCapabilityAnalysis7ProcessCapabilityProcessCapabilitystudiescanindicatetheconsistencyoftheprocessoutputindicatethedegreetowhichtheoutputmeetsspecificationsbeusedforcomparisonwithanotherprocessorcompetitorProcessCapabilityAnalysisProcessCapabilityAnalysis8ProcessCapabilityvsSpecificationLimitsa）b）c）a）Processishighlycapableb）Processismarginallycapablec）ProcessisnotcapableProcessCapabilityAnalysisProcessCapabilityAnalysis9ThreeTypesofLimitsSpecificationLimits（LSLandUSL）createdbydesignengineeringinresponsetocustomerrequirementstospecifythetoleranceforaproductscharacteristicProcessLimits（LPLandUPL）measuresthevariationofaprocessthenatural6limitsofthemeasuredcharacteristicControlLimits（LCLandUCL）measuresthevariationofasamplestatistic（mean,variance,proportion,etc）ProcessCapabilityAnalysisProcessCapabilityAnalysis10ThreeTypesofLimitsDistributionofIndividualValuesDistributionofSampleAveragesProcessCapabilityAnalysisProcessCapabilityAnalysis11ProcessCapabilityIndicesTwomeasuresofprocesscapabilityProcessPotentialCpProcessPerformanceCpuCplCpkProcessCapabilityAnalysisProcessCapabilityAnalysis12ProcessPotentialTheCpindexassesseswhetherthenaturaltolerance（6）ofaprocessiswithinthespecificationlimits.ProcessCapabilityAnalysisProcessCapabilityAnalysis13ProcessPotentialACpof1.0indicatesthataprocessisjudgedtobe“capable”,i.e.iftheprocessiscenteredwithinitsengineeringtolerance,0.27%ofpartsproducedwillbebeyondspecificationlimits.CpRejectRate1.000.270%1.330.007%1.506.8ppm2.002.0ppbProcessCapabilityAnalysisProcessCapabilityAnalysis14ProcessPotentiala）b）c）a）Processishighlycapable（Cp2）b）Processiscapable（Cp=1to2）c）Processisnotcapable（Cp1.5）b）Processiscapable（Cpk=1to1.5）c）Processisnotcapable（Cpk1）a）Cp=2Cpk=2b）Cp=2Cpk=1c）Cp=2Cpk1ProcessCapabilityAnalysisProcessCapabilityAnalysis19Example1SpecificationLimits:

@#@4to16gMachineMeanStdDev（a）104（b）102（c）72（d）131DeterminethecorrespondingCpandCpkforeachmachine.ProcessCapabilityAnalysisProcessCapabilityAnalysis20Example1AProcessCapabilityAnalysisProcessCapabilityAnalysis21Example1BProcessCapabilityAnalysisProcessCapabilityAnalysis22Example1CProcessCapabilityAnalysisProcessCapabilityAnalysis23Example1DProcessCapabilityAnalysisProcessCapabilityAnalysis24ProcessCapabilityForanormallydistributedcharacteristic,thedefectiverateF（x）maybeestimatedviathefollowing:

@#@Forcharacteristicswithonlyonespecificationlimit:

@#@a）LSLonlyb）USLonlyLSLUSLProcessCapabilityAnalysisProcessCapabilityAnalysis25Example2SpecificationLimits:

@#@4to16gMachineMeanStdDev（a）104（b）102（c）72（d）131Determinethedefectiverateforeachmachine.ProcessCapabilityAnalysisProcessCapabilityAnalysis26Example2MeanStdDevZLSLZUSLF（xUSL）F（x）104-1.51.566,80766,807133,614102-3.03.01,3501,3502,70072-1.54.566,807366,811131-9.03.001,3501,350LowerSpecLimit=4g