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1、STATISTICALPROCESSCONTROLWC)REFERENCEMANUALIssued1992,SecondPrintingMarch1995(newcoveronly)Copyright01992,O1995ChryslerCorporation,FordMotorCompany,andGeneralMotorsCorporationSelectionProcedurefortheUseoftheControlChartsDescribedinThisManualDETERMINEC
2、HARACTERISTICTOBECHARTEDNONCONFORMlTlESYESCONDUCIVETOSUBGROUPSAMPLING-e.g.,CHEMICALYESUSECHARTFORINDIVIDUALS:X-MRNote:Thischartassumesthemeas-urementsystemhasbeenassessedandisappropriateFOREWORDThisReferenceManualwaspreparedbythequalityandsupplierasse
3、ssmentstaffsatChrysler,FordandGeneralMotors,workingundertheauspicesoftheAutomotiveDivisionoftheAmericanSocietyforQualityControlSupplierQualityRequirementsTaskForce,incollaborationwiththeAutomotiveIndustryActionGroup.TheASQCIAIAGTaskForcecharteristosta
4、ndardizethereferencemanuals,reportingformatsandtechnicalnomenclatureusedbyChrysler,FordandGeneralMotorsintheirrespectivesupplierassessmentsystems:SupplierQualityAssurance,TotalQualityExcellenceandTargetsforExcellence.Accordingly,thisReferenceManualcan
5、beusedbyanysuppliertodevelopinformationrespondingtotherequirementsofeitherChryslers,FordsorGeneralMotorssupplierassessmentsystems.Untilnow,therehasbeennounifiedformalapproachintheautomotiveindustryonstatisticalprocesscontrol.Certainmanufacturersprovid
6、edmethodsfortheirsuppliers,whileothershadnospecificrequirements.Inanefforttosimplifyandminimizevariationinsupplierqualityrequirements,Chrysler,Ford,andGeneralMotorsagreedtodevelopand,throughAIAG,distributethismanual.TheworkteamresponsiblefortheManuals
7、contentwasledbyLeonardA.BrownofGeneralMotors.Themanualshouldbeconsideredanintroductiontostatisticalprocesscontrol.ItisnotintendedtolimitevolutionofstatisticalmethodssuitedtoparticularprocessesorcommoditiesnorisitintendedtobecomprehensiveofallSPCtechni
8、ques.Questionsontheuseofalternatemethodsshouldbereferredtoyourcustomersqualityactivity.TheTaskForcegratefullyacknowledges:theseniorleadershipandcommitmentofVicePresidentsThomasT.StallkampatChrysler,ClintonD.LaueratFord,andDonaldA.PaisatGeneral
