統(tǒng)計質(zhì)量管理

第十四章統(tǒng)計質(zhì)量管理目錄第十四章統(tǒng)計質(zhì)量管理23333445679習(xí)題第1頁第十四章統(tǒng)計質(zhì)量管理4.圖5.第2頁第十四章統(tǒng)計質(zhì)量管理一、質(zhì)量與質(zhì)量波動原因由J·三、質(zhì)量管理的簡要歷程在第十四章統(tǒng)計質(zhì)量管理年。））653427—第十四章統(tǒng)計質(zhì)量管理圖第5頁第十四章統(tǒng)計質(zhì)量管理圖μxn2ii,μ為μσ。μσμσ第十四章統(tǒng)計質(zhì)量管理一、計量值控制圖表Rx4點第7頁第十四章統(tǒng)計質(zhì)量管理R年1x4ijx1nxG列niijH列ijnjnkkxRRxii____22_RR43A、D和D234_xRx、Rii表是x是R第十四章統(tǒng)計質(zhì)量管理表xx圖Rp第9頁第十四章統(tǒng)計質(zhì)量管理ucX表ppp4年1pxp于miniinimiiikkmiipkknniipp)/np3pii和第十四章統(tǒng)計質(zhì)量管理1kki圖p第十四章統(tǒng)計質(zhì)量管理σααβI256現(xiàn)7點位于同側(cè)，或連續(xù)。圖圖32734。第頁第十四章統(tǒng)計質(zhì)量管理圖是3σμσσ為Bσ。一、工序能力指數(shù)σ第頁第十四章統(tǒng)計質(zhì)量管理令TT為公差上限，TT=T—TULULCpTCpμMμ=MμMσμμ是x與Mp0.040)0.020)MU22^0.040)0.020)TCUpμ與MCC'ppk和C'pk；C'LTTp第十四章統(tǒng)計質(zhì)量管理p0.040)0.020)U22^x50.017MkTT0.010)C：pCC'k)ppT)(T)TTTCULULpTxsULTTCUUpxTCLLLp(np)10，試計算工序能力指數(shù)C。pipnp==4104CLp第十四章統(tǒng)計質(zhì)量管理C。pLLLpσσCp1.67C1.67Cppp1.00C1.33pp0.67CC。pp。第頁第十四章統(tǒng)計質(zhì)量管理Qualitymanagementisamethodforensuringthatalltheactivitiesnecessarytodesign,developandimplementaproductorserviceareeffectiveandefficientwithrespecttothesystemanditsperformance.Qualitymanagementusesqualityassuranceandcontrolofprocesses,andproductstoachievemoreconsistentquality.Qualitycontrol(QC)isaprocessemployedtoensureacertainlevelofqualityinaproductorservice.QChasastrongstatisticalfoundationbasedonathoroughknowledgeofvariability,systemsperspective,andbeliefincontinuousimprovement.SuchstatisticaltoolsasParetodiagrams,Fishbonediagram,andcontrolchartsareanintegralpartofthisapproach.Theprincipalfocusofthecontrolchartistoattempttoseparateassignablecausesofvariationfromcommoncausesofvariation.Assignablecausesofvariationrepresentlargefluctuationsorpatternsinthedatathatarenotinherenttoaprocess.Thesefluctuationsareoftencausedbychangesinasystemthatrepresenteitherproblemstobefixedoropportunitiestoexploit.CommonThemosttypicalformofcontrolchartswillsetcontrollimits）thatarewithin±3standarddeviationsofthestatisticalmeasureofinterest.Thecontrolchartisameansofmonitoringvariationinthecharacteristicofaproductorservicebyfocusingonthetimedimensioninwhichthesystemproducesproductsorservicesandstudyingthenatureofthevariabilityinthesystem.Thecontrolchartisusedtostudypastperformanceand/ortoevaluatepresentconditions.Datacollectedfromacontrolchartformthebasisforprocessimprovement.Controlchartsareusedfordifferenttypesofvariables–forcategoricalvariablesandcontinuousvariables.Theprocesscapabilityindexisastatisticalmeasureofprocesscapability:TheabilityofaProcesscapabilityindicesareconstructedtoexpressmoredesirablecapabilitywithincreasinglyhighervalues.Valuesnearorbelowzeroindicateprocessesoperatingofftargetorwithhighvariation.Paretodiagram,Fishbonediagram,fluctuation,assignablecauses,common