Measure Step 03 (MSA)

1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialMeasurementSystemsAnalysis1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialObjectivesIntroduceMeasurementSystemsAnalysisShowitslinkintotheM-A-I-CStrategyDefinebasicmeasurementterminologyDefinedifferenttypesofmeasurementsystems1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialAnyinformationwegatheraboutprocessbehaviormustfirstpassthroughasensorysystem.AProcess:ProcessInputsOutputs•Observations•Measurements•Information•DataProcessInputsOutputsParts(Example)Documents(Example)OR1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialInotherwords,wemustsubmittheoutputfromthefirstprocesstoasecondprocessProcessInputsOutputsInputsMeasurementProcessOutputs•Observations•Measurements•Information•DataParts(Example)--the“MeasurementProcess”.1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialBackgroundWhataremeasurementsystems?_________________________________________Whywouldwewanttocheckthem?_________________________________________PhaseI:ProcessMeasurement•MapprocessandidentifyKeyInputstoCTQs•EstablishMeasurementSystemCapability•EstablishProcessCapabilityBaselinePhaseII:ProcessAnalysis•CompleteFMEA•ContinuetoidentifyKeyInputVariables•ReviewCapabilityData,Pareto’s,etc.•DevelopPlanforNextPhasePhaseIII:ProcessImprovement•Verify&OptimizeCriticalKPIV’sPhaseIV:Control•ImplementControlPlan•VerifyLongTermCapabilityPURPOSE1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialWhoHasMeasurementSystemErrors...EveryoneTypicalStudentResponseHey,thisisn’tmanufacturing,itsanon-technicalworld,wedon’thavemeasurementsystemissues.OhYeah..............1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialBlueShirtExerciseAfterInstructionsAreGiven:•Nofurtherquestions•Nofurthercommunication(verbalornon-verbal)Example#1Whattypeofdataisarewecollectinghere?[AttributesData?,VariablesData?]1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialTimeExerciseWhatTimeIsIt?Isthisgoodenoughtodeterminewhentogotolunch?IsitgoodenoughtolaunchaSpaceShuttle?Example#2Whattypeofdataarewecollectinghere?[AttributesData?,VariablesData?]1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialImportantQuestionsToAskHowbigisthemeasurementerror(i.e.,measurementvariation)?Canwedetectprocessimprovementifandwhenithappens?Istheretoomuchroundinginthedata?(i.e.,Arethemeasurementsbeingmadewithmeasurementunitswhicharesmallenoughtoproperlyreflectthevariationpresent?)IstheMeasurementSystemchanging/driftingovertime?Arethemeasurementsaccurate?IstheMeasurementSystem“capable”forthisstudy?Howmuchuncertaintyshouldbeattachedtoameasurementwheninterpretingit?Whatarethesourcesofmeasurementerror(variation)?Howdoweimprovethemeasurementsystem?1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialMeasurementSystemsAnalysisChecklistReviewthefollowingGuide&ChecklistBEFOREconductinganin-depthmeasurementsystemstudy.GUIDEtoMeasurementSystemsAnalysisandvalidationofdatasources:1.Whatisthemeasurementprocedureused?2.Brieflydescribethemeasurementprocedure.Whatstandardsapply?Areused?3.Whatistheprecision(measurementerror)ofthesystem?4.Howhastheprecisionbeendetermined?5.Whatdoesthegage(measurementsystem)Supplierclaimtobethedevice’s:=Discrimination=Accuracy(Bias)?=Precision(MeasurementError)?6.Doyouhaveresultsofa:=Test-Retest(Repeatabilityonly)Study?(DeterminesMeasurementErroror“lack-of-precision”)=GageR&RStudy?[Allocatestheerrorbetweendeviceandoperator(s)]Ifso,whatarethey?7.Aredifferentmeasurementsystems(gages,scales,etc.)usedtogatherthesamedata?Identifywhichdatacomesfromwhichdevice.1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialTheMeasurementProcessshouldbemanagedasatruePROCESSProcessInputsOutputsMeasurementProcessInputsOutputs•Observations•Measurements•DataParts(Example)PhaseI:ProcessMeasurementPhaseII:ProcessAnalysisPhaseIII:ProcessImprovementPhaseIV:ProcessControl1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidential'MeasurementVariation'HumidityCleanlinessVibrationLineVoltageVariationTemperatureFluctuationOperatorTechniqueStandardProceduresSufficientWorkTimeMaintenanceStandardCalibrationFrequencyOperatorTrainingEaseofDataEntryMethodsMeaEnvironmentAlgorithmInstabiltyElectricalInstabilityWearMechanicalinstabilityToolEnvironmentWorkMethodsSourcesofMeasurementVariationProcessMapoftheMeasurementProcessItselfCause&EffectDiagram(FishboneDiagram)Step1Step2Step3Step41g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialMeasurementSystemsAnalysis1g2001,GeneralElectricCompany,USA.AllrightsreservedVersion43/01GEConfidentialEXERCISE:Accuracyvs.PrecisionTargetShotgunPelletsorHoseDropletsExercise:Oneortwoparticipantsremovethenextpagefromthenotebook(mayneedtoborrowpages)andplaceacheckintheappropriateboxes--1pageforeachofthe4targ