ISO 3951-3-2007 计量检验的抽样程序.第3部分:按接收质量限(AQL)检索的逐批检验二次抽样计划

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【英文标准名称】:Samplingproceduresforinspectionbyvariables-Part3:Doublesamplingschemesindexedbyacceptancequalitylimit(AQL)forlot-by-lotinspection
【原文标准名称】:计量检验的抽样程序.第3部分:按接收质量限(AQL)检索的逐批检验二次抽样计划
【标准号】:ISO3951-3-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-05
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC69
【标准类型】:()
【标准水平】:()
【中文主题词】:接收质量限;验收抽样;合格质量级值;批量检验;特征;缺陷;定义;图示;误差;检验;计量检查;抽样特征曲线;参数;质量保证;随机试样;样品试验;抽样方法;抽样表;统计质量控制;统计学;表(数据);测试
【英文主题词】:Acceptablequalitylimits;Acceptancesampling;AQL-value;Batchtesting;Characteristics;Defects;Definitions;Diagrams;Errors;Inspection;Inspectionbyvariables;Operatingcharacteristiccurve;Parameters;Qualityassurance;Randomsamples;Sampletests;Samplingmethods;Samplingtables;Statisticalqualitycontrol;Statistics;Tables(data);Testing
【摘要】:ThispartofISO3951specifiesanacceptancesamplingsystemofdoublesamplingschemesforinspectionbyvariablesforpercentnonconforming.Itisindexedintermsoftheacceptancequalitylimit(AQL).TheobjectivesofthemethodslaiddowninthispartofISO3951aretoensurethatlotsofacceptablequalityhaveahighprobabilityofacceptanceandthattheprobabilityofnon-acceptinginferiorlotsisashighaspracticable.Thisisachievedbymeansoftheswitchingrules,whichprovide?automaticprotectiontotheconsumer(bymeansofaswitchtotightenedinspectionordiscontinuationofsamplinginspection)shouldadeteriorationinqualitybedetected,and?anincentive(atthediscretionoftheresponsibleauthority)toreduceinspectioncosts(bymeansofaswitchtoasmallersamplesize)shouldconsistentlygoodqualitybeachieved.InthispartofISO3951,theacceptabilityofalotisimplicitlyorexplicitlydeterminedfromanestimateofthepercentageofnonconformingitemsintheprocess,basedoneitheroneortworandomsamplesofitemsfromthelot.ThispartofISO3951isprimarilydesignedforuseunderthefollowingconditions:a)wheretheinspectionprocedureistobeappliedtoacontinuingseriesoflotsofdiscreteproductsallsuppliedbyoneproducerusingoneproductionprocess;iftherearedifferentproducersorproductionprocesses,applythispartofISO3951toeachoneseparately;b)wheretheitemsofproducthaveasinglequalitycharacteristic(formultiplequalitycharacteristics,seeinformativeAnnexesA,BandC);c)wherethequalitycharacteristicismeasurableonacontinuousscale;d)wherethemeasurementerrorisnegligible(i.e.withastandarddeviationofnomorethan10%ofthecorrespondingprocessstandarddeviation);e)whereproductionisstable(understatisticalcontrol)andthequalitycharacteristicisdistributed,atleasttoacloseapproximation,accordingtoanormaldistribution;CAUTION—TheproceduresinthispartofISO3951arenotsuitableforapplicationtolotsthathavebeenscreenedpreviouslyfornonconformingitems.f)wherethepossibilityofhavingtoselectandinspectasecondsampleisadministrativelyacceptable;
【中国标准分类号】:A41
【国际标准分类号】:03_120_30
【页数】:113P;A4
【正文语种】:英语