Designation:E1994−09(Reapproved2018)AnAmericanNationalStandardStandardPracticeforUseofProcessOrientedAOQLandLTPDSamplingPlans1ThisstandardisissuedunderthefixeddesignationE1994;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisstandardisanabbreviatedcompilationofthesamplingplanspresentedbyH.F.DodgeandH.G.Romigintheirclassicdevelopmentofsamplingplansforusewiththeprocessassociatedwithacontinuingsupplyofproducts.ThesocalledAOQLplansprovideameansfordispositionofproductwhetherornottheprocessisincontrolaswellasincentivesforprocessimprovementintermsofreducedsamplesizeastheprocessaveragepercentdefectiveislowered.Inaddition,socalledLTPDplansareprovidedforusewithindividuallotsofproduct,notnecessarilyassociatedwithaprocessstream.ThesamplingplansandpartsofthetextgivenherearetakenfromtheWileyClassicsLibraryEditionoftheDodge-Romigtables(copyright1998).2Additionaltablesanddetaileddiscussionoftheplans,OCcurves,andtheirderivationwillbefoundinthattext.ThetheoreticaldevelopmentoftheDodge-RomingplanswillbefoundinVolumes8and20oftheBellSystemTechnicalJournal3,4andanamplificationoftheplansisgiveninAcceptanceSamplinginQualityControl.51.Scope1.1ThispracticeisprimarilyastatementofprincipalsfortheguidanceofASTMtechnicalcommitteesandothersintheuseofaverageoutgoingqualitylimit,AOQL,andlottolerancepercentdefective,LTPD,samplingplansfordeterminingacceptableoflotsofproduct.1.2Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:6E178PracticeforDealingWithOutlyingObservationsE456TerminologyRelatingtoQualityandStati...
