【英文标准名称】:Samplingproceduresforinspectionbyvariables-Part5:Sequentialsamplingplansindexedbyacceptancequalitylimit(AQL)forinspectionbyvariables(knownstandarddeviation)
【原文标准名称】:计量检验的抽样程序.第5部分:按接收质量限(AQL)检索的计量检验连续抽样计划的规范(已知标准偏差)
【标准号】:ISO3951-5-2006
【标准状态】:现行
【国别】:国际
【发布日期】:2006-03
【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;特性;缺陷;定义;图示;误差;检验;计量检查;抽样特性曲线;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);试验
【英文主题词】:Acceptablequalitylimits;Acceptancesampling;AQL-value;Characteristics;Defects;Definitions;Diagrams;Errors;Inspection;Inspectionbyvariables;Operatingcharacteristiccurve;Parameters;Qualityassurance;Randomsamples;Sampletests;Samplingmethods;Samplingtables;Statisticalqualitycontrol;Statistics;Tables(data);Testing
【摘要】:ThispartofISO3951specifiesasystemofsequentialsamplingplans(schemes)forlot-by-lotinspectionbyvariables.Theschemesareindexedintermsofapreferredseriesofacceptancequalitylimit(AQL)values,rangingfrom0,01to10,whicharedefinedintermsofpercentnonconformingitems.TheschemesofISO3951areintendedtoinduceasupplierthroughtheeconomicandpsychologicalpressureoflotnon-acceptancetomaintainaprocessaverageatleastasgoodasthespecifiedAQLvalue,whileatthesametimeprovidinganupperlimitfortherisktotheconsumerofacceptingtheoccasionalpoorlot.Theschemesaredesignedtobeappliedtoacontinuingseriesoflots,thatis,aserieslongenoughtoallowtheswitchingrules(Clause6)tobeapplied.Theseswitchingrulesprovide:—automaticprotectiontotheconsumer(bymeansofaswitchtotightenedinspectionordiscontinuationofsamplinginspection)shouldadeteriorationinqualitybedetected;—anincentive(atthediscretionoftheresponsibleauthority)toreduceinspectioncosts(bymeansofaswitchtoreducedinspection)shouldconsistentlygoodqualitybeachieved.ThispartofISO3951isdesignedforuseunderthefollowingconditions:a)wheretheinspectionprocedureistobeappliedtoacontinuingseriesoflotsofdiscreteproductsallsuppliedbyoneproducerusingoneproductionprocess.Iftherearedifferentproducersorproductionprocesses,applythispartofISO3951toeachoneseparately;b)whereonlyasinglequalitycharacteristic,x,oftheseproductsistakenintoconsideration,whichmustbemeasurableonacontinuousscale;c)wheretheuncertaintyofthemeasurementsystemisnegligiblewithrespecttotheproductionprocessstandarddeviation;d)whereproductionisstable(understatisticalcontrol)andthequalitycharacteristic,x,isdistributedaccordingtoanormaldistribution(oracloseapproximationtothenormaldistribution)oradistributionwhichmaybemathematicallytransformedtoanormaldistribution;e)wherethestandarddeviationofthequalitycharacteristic,x,isknown;CAUTION—TheproceduresinthispartofISO3951arenotsuitableforapplicationtolotsthathavebeenscreenedpreviouslyfornonconformingitems.f)whereacontractorstandarddefinesanupperspecificationlimit,U,alowerspecificationlimit,L,orboth;anitemisqualifiedasconformingifandonlyifitsmeasuredqualitycharacteristic,x,satisfiestheappropriateoneofthefollowinginequalities:
【中国标准分类号】:A00
【国际标准分类号】:03_120_30
【页数】:36P;A4
【正文语种】:英语