【英文标准名称】:StandardPracticeforEstimatingandMonitoringtheUncertaintyofTestResultsofaTestMethodinaSingleLaboratoryUsingaControlSampleProgram
【原文标准名称】:用对照试样方案的单个实验室试验方法的试验结果不确定度进行估算和监测用标准实施规程
【标准号】:ASTME2554-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:E11.20
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:控制图表;控制样品;测定;估算;检验(质量保证);实验室;实验室测试;测量不确定度;监督(认可);试验结果;测试
【英文主题词】:controlchart;controlsample;intermediateprecision;testresult;uncertainty
【摘要】:LaboratoriesaccreditedunderISO17025arerequiredtopresentuncertaintyestimatesfortheirtestresults.Thispracticeprovidesproceduresthatusetestresultstodevelopuncertaintyestimatesforanindividuallaboratory.Generally,thesetestresultswillbefromasinglesampleofstableandhomogeneousmaterialknownasacontrolorchecksample.Thetruevalueofthecharacteristic(s)ofthecontrolsamplebeingmeasuredwillordinarilybeunknown.However,thismethodologymayalsobeusedifthecontrolsampleisareferencematerial,inwhichcasethetestmethodbiasmayalsobeestimatedandincorporatedintotheuncertaintyestimate.Manytestmethodsdonothavetruereferencematerialsavailabletoprovidetraceablechainsofuncertaintyestimation.Thispracticealsoallowsforongoingmonitoringofthelaboratoryuncertainty.Asestimatesofthelevelofuncertaintychange,possiblyascontributionstouncertaintyareidentifiedandminimized,revisiontothelaboratoryuncertaintywillbepossible.1.1Thispracticedescribestechniquesforalaboratorytoestimatetheuncertaintyofatestresultusingdatafromtestresultsonacontrolsample.1.2Uncertaintyasdefinedbythispracticeappliestothecapabilitiesofasinglelaboratory.Anyestimateofuncertaintydeterminedthroughtheuseofthispracticeappliesonlytotheindividuallaboratoryforwhichthedataarepresented.1.3Thelaboratoryusesawelldefinedandestablishedtestmethodindeterminingaseriesoftestresults.Theuncertaintyestimatedusingthispracticeonlyapplieswhenthesametestmethodisfollowed.Theuncertaintyonlyappliesforthematerialtypesrepresentedbythecontrolsamples,andmultiplecontrolsamplesmaybeneeded,especiallyifthemethodhasdifferentprecisionfordifferentsampletypesorresponselevels.1.4Theuncertaintyestimatedeterminedbythispracticerepresentstheintermediateprecisionoftestresults.Thisestimateseekstoquantifythetotalvariationexpectedwithinasinglelaboratoryusingasingleestablishedtestmethodwhileincorporatingasmanyknownsourcesofvariationaspossible.1.5Thispracticedoesnotestablisherrorestimates(errorbudget)attributedtoindividualfactorsthatcouldinfluenceuncertainty.1.6Thispracticedescribestheuseofcontrolchartstoevaluatethedataobtainedandpresentsaspecialtypeofcontrolcharttomonitortheestimateofuncertainty.1.7ThesystemofunitsforthisStandardisnotspecified.DimensionalquantitiesintheStandardarepresentedonlyasillustrationsofcalculationmethods.Theexamplesarenotbindingonproductsortestmethodstreated.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A00
【国际标准分类号】:03_120_10;19_020
【页数】:7P.;A4
【正文语种】: