International Standard
ISO 2859-1:2026(en) Third edition2026-01
Sampling procedures for inspection by attributes --
Part 1: Sampling schemes indexed by acceptancequalitylimit(AQL)for lot-by-lot inspection
Partie1:Proceduresd'echantillonnagepourlescontroleslotparlot indexes d’apresleniveau dequaliteacceptable(NQA)
Contents
PageForeword.Introduction... ...vii1 Scope.... 11.1 Continuousinspection 11.2 Skip-.lotinspection.... 22 Normativereferences.... 23 Terms definitions andsymbols 23.1 Termsanddefinitions.... 23.2 Symbolsandabbreviations.... ..104 Expressionofnonconformity.. ..114.1 Genera...... ...114.2 Classificationofnonconformities ..115 Acceptancequalitylimit(AQL) .115.1 Use and application.. ...115.2 SpecifyingAQLs ..115.3 PreferredAQLs.... ...126 Submission of productfor sampling. ...126.1 Formationoflots... ...126.2 Presentation oflots.. ...1.27 Acceptanceandnon-acceptance..... ..127.1 Acceptabilityoflots. ...127.2 Dispositionofnon-acceptablelots..... ...127.3 Nonconformingitems... ...127.4 Classesofnonconformitiesornonconformingitems. ...127.5 Specialreservationforcriticalclassesofnonconformities ...137.6 Resubmittedlots... ...138 Drawingofsamples. ...138.1 Sampleselection.. ...138.1.1 General. ..138.1.2 Skip-lot... ...138.2 Whentodrawthesamples. ..13Doubleormultiplesampling.8.3 ...149 Normal tightened reducedandskip-lotsamplinginspection. ..149.1 Startofinspection... ...1.49.2 Continuationofinspection. ...49.3 Switchingrulesandprocedures.... ..1.49.3.1 Normaltotightened ...149.3.2 Tightenedtonormal ...1.49.3.3 Normaltoreduced ..1.49.3.4 Reducedtonormal ...169.3.5 Skip-lottonormal. ...169.3.6 Reduced toskip-lot ..169.4 Discontinuation ofinspection ...169.5 Skip-lotsamplinginspection ...1.69.5.1 ..16Generalrequirements.9.5.2 Producerandproductqualification.... ...17
ISO2859-1:2026(en)
9.5.3 Qualificationanddisqualification.... ...189.5.4 Responsibilitiesonproducerqualification....10 Samplingplans.... ..1910.1 Inspectionlevel. ..1.910.2 Samplesizecodeletters... ...010.3 Obtaininga samplingplan... .010.4 Typesof.s.am..ing..ans..11 Deter.inationo..accet.a.ilit.. ..111.1 Inspe.ctionfor. nonconormingit.ems... ...1...111.2 Singlesampling plans(integeracceptancenumber).11.3 Doublesamplingplans.... ...2111.4 Multiplesamplingplans... ..2111.5 Inspectionfornonconformities.... ..212 Furtherinformation. ..2212.1 Operatingcharacteristic(oc)curves..... ...212.2 Processaverage. ...2212.3 Averageoutgoingquality(AoQ)..... ...2212.4 Averageoutgoingqualitylimit(AoQL). ...2212.5 ...2212.6 Consumer'sandproducer'srisks.... .2312.6.1Use of individual plans.... ..312.6.2Consumer'sriskquality(CRQ)tables.... ..2312.6..3Producer'srisk(PR)tables..13 Fractional acceptancenumberplansforsinglesampling(optional) ..313.1 Applicationoffractional acceptancenumberplans.... ..2313.2 Acceptabilitydetermination.... ..413.2.1Inspectionfornonconformingitems.. ..413.2..2Inspectionfornumberof nonconformities.... ..2513.3Swit.chingrules.. ...513.3.1Normaltotightenedandtightenedtonormal. ..2513.3.2Normal toreduced..... ..513.3..3Reducedtonormalinspectionanddiscontinuationofinspection.... ...513...Non..con.t.t.ants.a..ing.pa.an..14 Inspet.ion.Error.15 SamplesizecodeIeters...16 Tablesof.sin.les.am.oing.lans..Tablesofdoublesamplingplans..1718 Tables of multiple sampling plans...19 Tables of producer's risk(PR) ....20 Tablesofconsumerriskquality(CRQ)21 Tables of average outgoingqualitylimits(AoQL)22 Averagesamplesizeparisonsbyacceptancenumber....23 Tablesofsinglesamplingfractionalacceptancenumberplans.....24 Normalizedschemeoperatingcharacteristiccurves.....AnnexA(informative)Examplefornon-constantsamplingplan...AnnexB(informative)Samplingstrategies... ..58
