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【英文标准名称】:StandardPracticeforLaboratoryBiasDetectionUsingSingleTestResultfromStandardMaterial
【原文标准名称】:用标准物质的单项试验结果检测实验室偏差的标准实施规程
【标准号】:ASTMD6617-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D02.94
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:acceptedreferencevalue;bias;checkstandard;consensus;poweroftest;probabilityofbiasdetection;typeIerror;typeIIerror;Bias;Laboratorytesting;Smalltestresult;Statisticalmethods
【摘要】:LaboratoriesperformingpetroleumtestmethodscanusethispracticetosetanacceptabletolerancezoneforinfrequenttestingofCSorCCSmaterial,basedonx03B5;,andadesiredTypeIerror,forthepurposeofascertainingifthetestmethodisbeingperformedwithoutbias.Thispracticecanbeusedtoestimatethepowerofcorrectlydetectingbiasofdifferentmagnitudes,usingtheacceptabletolerancezonesetin4.1,andhence,gaininsightintothelimitationofthetruebiasdetectioncapabilityassociatedwiththisacceptabletolerancezone.Withthisinsight,trade-offscanbemadebetweendesiredTypeIerrorversusdesiredbiasdetectioncapabilitytosuitspecificbusinessneeds.TheCStestingactivitiesdescribedinthispracticeareintendedtoaugmentandnotreplacetheregularstatisticalmonitoringoftestmethodperformanceasdescribedinPracticeD6299.1.1ThispracticecoversamethodologyforestablishinganacceptabletolerancezoneforthedifferencebetweentheresultobtainedfromasingleimplementationofatestmethodonaCSanditsARV,basedonuser-specifiedTypeIerror,theuser-establishedtestmethodprecision,thestandarderroroftheARV,andapresumedhypothesisthatthelaboratoryisperformingthetestmethodwithoutbias.Note18212;Throughoutthispractice,thetermuserreferstotheuserofthispractice;andthetermlaboratory(see1.1)referstotheorganizationorentitythatisperformingthetestmethod.1.2Forthetolerancezoneestablishedin1.1,amethodologyispresentedtoestimatetheprobabilitythatthesingletestresultwillfalloutsidethezone,intheeventthatthereisabias(positiveornegative)ofauser-specifiedmagnitudethatisdeemedtobeofpracticalconcern(thatis,thepresumedhypothesisisnottrue).1.3ThispracticeisintendedforASTMCommitteeD02testmethodsthatproduceresultsonacontinuousnumericalscale.1.4Thispracticeassumesthatthenormal(Gaussian)modelisadequateforthedescriptionandpredictionofmeasurementsystembehaviorwhenitisinastateofstatisticalcontrol.Note28212;WhilethispracticedoesnotcoverscenariosinwhichmultipleresultsareobtainedonthesameCSundersiteprecisionorrepeatabilityconditions,thestatisticalconceptspresentedareapplicable.UserswishingtoapplytheseconceptsforthescenariosdescribedareadvisedtoconsultastatisticianandtoreferencetheCSmethodologydescribedinPracticeD6299.
【中国标准分类号】:A69
【国际标准分类号】:19_020
【页数】:5P.;A4
【正文语种】:英语