ASQ-Z1.4-2008

ANSI/ASQZ1.4-2008AMERICANSOCIETYFORQUALITY600NORTHPLANKINTONAVENUEMILWAUKEE,WISCONSIN53203AMERICANNATIONALSTANDARDSAMPLINGPROCEDURESANDTABLESFORINSPECTIONBYATTRIBUTESCopyrightAmericanSocietyforQualityProvidedbyIHSunderlicensewithASQNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---AMERICANNATIONALSTANDARDSamplingProceduresandTablesforInspectionbyAttributesPreparedbyTheStatisticsSubcommitteeoftheAccreditedStandardsCommitteeZ1onQuality,Environment,DependabilityandStatisticsSecretariatAmericanSocietyforQualityANSI/ASQZ1.4-2008CopyrightAmericanSocietyforQualityProvidedbyIHSunderlicensewithASQNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---AbstractSamplingProceduresandTablesforInspectionbyAttributesisanacceptancesamplingsystemtobeusedwithswitchingrulesonacontinuingstreamoflotsforAQLspecified.Itprovidestightened,normal,andreducedplanstobeappliedforattributesinspectionforpercentnonconformingornonconformitiesper100units.AMERICANNATIONALSTANDARD:AnAmericannationalStandardimpliesaconsensusofthosesubstantiallycon-cernedwithitsscopeandprovisions.AnAmericanNationalStandardisintendedasaguidetoaidthemanufacturer,theconsumer,andthegeneralpublic.TheexistenceofanAmericanNationalStandarddoesnotinanyrespectprecludeany-one,whetherhehasapprovedthestandardornot,frommanufacturing,marketing,purchasing,orusingproducts,processes,orproceduresnotconformingtothestandard.AmericanNationalStandardsaresubjecttoperiodicreviewandusersarecautionedtoobtainthelatesteditions.CAUTIONNOTICE:ThisAmericanNationalStandardmayberevisedorwithdrawnatanytime.TheproceduresoftheAmericanNationalStandardsInstituterequirethatactionbetakentoreaffirm,revise,orwithdrawthisstandardnolaterthanfiveyearsfromthedateofpublication.PurchasersofAmericanNationalStandardsmayreceivecurrentinformationonallstandardsbycallingorwritingtheAmericanNationalStandardsInstitute.PublishedbyAMERICANSOCIETYFORQUALITY600NORTHPLANKINTONMILWAUKEE,WISCONSIN53203©2008bytheAMERICANSOCIETYFORQUALITYNopartofthispublicationmaybereproducedinanyform,inanelectronicretrievalsystemorotherwise,withoutthepriorwrittenpermissionofthepublisher.PrintedintheUnitedStatesofAmericaCopyrightAmericanSocietyforQualityProvidedbyIHSunderlicensewithASQNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---Forewordiii(ThisforewordisnotapartoftheAmericanNationalStandard—SamplingProceduresandTablesforInspectionbyAttributes,Z1.4-2008)ThisstandardisareaffirmationofANSI/ASQCZ1.4-2003,“SamplingProceduresandTablesforInspectionbyAttributes.”Suggestionsforimprovementofthisstandardarewelcomed.Sendyourcommentstothesponsor,ASQStandards,600NorthPlankintonAvenue,Milwaukee,WI53203.CopyrightAmericanSocietyforQualityProvidedbyIHSunderlicensewithASQNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---(Thispageintentionallyleftblank)CopyrightAmericanSocietyforQualityProvidedbyIHSunderlicensewithASQNotforResaleNoreproductionornetworkingpermittedwithoutlicensefromIHS--`,,```,,,,````-`-`,,`,,`,`,,`---TableofContentsParagraphPage1.SCOPE............................................................................12.DEFINITIONSANDTERMINOLOGY.................................................13.PERCENTNONCONFORMINGANDNONCONFORMITIESPERHUNDREDUNITS..................................................................24.ACCEPTANCEQUALITYLIMIT(AQL)................................................25.SUBMISSIONOFPRODUCT.........................................................36.ACCEPTANCEANDNON-ACCEPTANCE..............................................37.DRAWINGOFSAMPLES............................................................48.NORMAL,TIGHTENED,ANDREDUCEDINSPECTION.................................49.SAMPLINGPLANS.................................................................510.DETERMINATIONOFACCEPTABILITY..............................................611.SUPPLEMENTARYINFORMATION..................................................6TablesTableISampleSizeCodeLetters............................................................10TableII-ASingleSamplingPlansforNormalInspection(MasterTable)................................11TableII-BSingleSamplingPlansforTightenedInspection(MasterTable)..............................12TableII-CSingleSamplingPlansforReducedInspection(MasterTable)...............................13TableIII-ADoublingSamplingPlansforNormalInspection(MasterTable)..............................14TableIII-BDoublingSamplingPlansforTightenedInspection(MasterTable)............................15TableIII-CDoublingSamplingPlansforReducedInspection(MasterTable).............................16TableIV-AMultipleSamplingPlansforNormalInspection(MasterTable)...............................17TableIV-BMultipleSamplingPlansforTightenedInspection(MasterTable)............................19TableIV-CMultipleSamplingPlansforReducedInspection(MasterTable)............................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