资源描述：
《MSA测量系统分析培训教程.pdf》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、MEASUREMETSYSTEMANALYSISWONGKJ:MSATRAINING,APR05Title:MeasurementSystemAnalysisObjective:ToequipyouwithadetailedunderstandingonMeasurementSystemAnalysis(MSA)andthebasicstatisticaltoolsnecessarytoperformtheanalysisusingMinitabsoftware.Thisiscrucialtoensuri
2、ngagoodmeasurementsystemisavailableandtobeusedforprocesscontrolandimprovementactivities.WONGKJ:MSATRAINING,APR05Thiscoursewillcover:1.What’sMSA?2.ElementsinMSA•Accuracy/Bias•Linearity(Regressionmethod)•Stability•GRR•CasestudiesinimprovingAccuracyandLinear
3、ity3.BasicIntroductiontoMinitabforMSAAnalysis4.VariableMeasurementSystem•NumbersofDistinctCategories(ndc)•AverageandRangeMethod•ANOVAmethod•ChartInterpretation(GRRContributionbyAppraisers,Parts,InteractionbetweenAppraisersandParts)•CasestudiesinimprovingG
4、RRandndc5.DestructiveGRR(Nested)•CasestudiesinimprovingGRR,ndc.6.AttributeMeasurementSystem•LinkingAttributeMeasurementSystemwithOperator’scertification,RisktoCustomer(under-kill)andYield(over-kill)7.MeasurementProblemAnalysisWONGKJ:MSATRAINING,APR05Obser
5、vedTotalProcessσ2σ2totalvariationprocessσ2MSActualprocessMeasurementvariation(Process)variation(MS)WithinBetweenAppraiser/MeasurementsamplesampleUserInstrumentvariationvariationvariationvariationWONGKJ:MSATRAINING,APR05KeyAspectsofMeasurementSystem•Accura
6、cy/bias•Stability•Linearity•GRR•Repeatability•Reproducibility•ndcWONGKJ:MSATRAINING,APR05WONGKJ:MSATRAINING,APR05ACCURACY/BIAS•Deviationoftheaveragemeasurementfromthetruevalue/refvalue.•MeasurethesystematicerrorofMS.•Possiblecausesincludepoorcalibration,w
7、orninstrument,damagedMaster.BIASMSAVERAGEREFVALUEWONGKJ:MSATRAINING,APR05Accuracy/BIAS•Obtainonesamplewithitsrefvalue•Measurethesamplen>10timesandrecordeachresult•Calculatethebiasofeachindividualreading•UsingMinitab:BIAS•UseOnesampleTtest,•ifp>0.05,accept
8、Ho(nobiasissue)•ifp<0.05,rejectHo(Biasissueexists)MSAVERAGEREFVALUE•UseRegressionModel,checkforRsq(adj)•ifRsq(adj)>0.80,regressionmodelisgood/valid(biasissueexists)•ifRsq(adj)<0.80,regressionmodelisinvalid(nobiasiss
