Designation:E1994−09(Reapproved2013)AnAmericanNationalStandardStandardPracticeforUseofProcessOrientedAOQLandLTPDSamplingPlans1ThisstandardisissuedunderthefixeddesignationE1994;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisstandardisanabbreviatedcompilationofthesamplingplanspresentedbyH.F.DodgeandH.G.Romigintheirclassicdevelopmentofsamplingplansforusewiththeprocessassociatedwithacontinuingsupplyofproducts.ThesocalledAOQLplansprovideameansfordispositionofproductwhetherornottheprocessisincontrolaswellasincentivesforprocessimprovementintermsofreducedsamplesizeastheprocessaveragepercentdefectiveislowered.Inaddition,socalledLTPDplansareprovidedforusewithindividuallotsofproduct,notnecessarilyassociatedwithaprocessstream.ThesamplingplansandpartsofthetextgivenherearetakenfromtheWileyClassicsLibraryEditionoftheDodge-Romigtables(copyright1998).Additionaltablesanddetaileddiscussionoftheplans,OCcurves,andtheirderivationwillbefoundinthattext.2ThetheoreticaldevelopmentoftheDodge-RomingplanswillbefoundinVolumes8and20oftheBellSystemTechnicalJournal3,4andanamplificationoftheplansisgiveninAcceptanceSamplinginQualityControl.51.Scope1.1ThispracticeisprimarilyastatementofprincipalsfortheguidanceofASTMtechnicalcommitteesandothersintheuseofAverageOutgoingQualityLimit,AOQL,andLotTolerancePercentDefective,LTPD,samplingplansfordeter-miningacceptableoflotsofproduct.2.ReferencedDocuments2.1ASTMStandards:6E178PracticeforDealingWithOutlyingObservationsE456TerminologyRelatingtoQualityandStatistics3.Terminology3.1Definitions—TerminologyE456providesamoreexten-sivelistoftermsinE11standards.3.2averagequalityprotection—atypeofprotectioninwhichthereisprescribedsomechosenvalueofaveragepercentdefectiveintheproductafterinspection(averageoutgoingqualitylimit(AOQL),thatshallnotbe...
