Designation:F1082–00(Reapproved2000)StandardPracticeforTires—DeterminingPrecisionforTestMethodStandards1ThisstandardisissuedunderthefixeddesignationF1082;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONKnowingtheprecision(andwherepossiblethebiasandaccuracy,orboth)oftestmeasurementsisvitalforefficienttechnicaldecisionmakinginanyareaoftechnology.Formanyyearsthechemicalandalliedmaterialindustrieshaveaddressedtheissueoftestprecision,especiallyasitappliestointer-laboratorytesting.Testmethodprecisionisimportantinthetireindustryaswell.Someofthespecificdetailsthatareimportantinlaboratorytestingfrequentlydonotapplywhenobjectssuchastiresaretested,especiallywhentestedforvariousperformancefeaturesatprovinggroundsorwithotheroutdoortestmethods.However,thebasicmethodologyof“within”and“between”laboratorytestprecisionassessmentcanbeappliedtotiretestingprovidedtheuniquecharacteristicsofsometiretestsarekeptinmind.Thispracticegivesbroadguidelinesfortiretestprecisionassessment.Whenspecialtestrequirementsarisethatdifferfromthemoreorthodoxprecisionmethodology,theywillhavetobeaddressedinaspecial“adhoc”manner.Asexperienceisgainedwiththese“specialcases”,theproceduresforhandlingthemcanbeformalizedandincorporatedintothispractice.1.Scope1.1ThispracticepresentsguidelinesforpreparingclearandmeaningfulprecisionstatementsfortestmethodstandardsontiresandrelatedobjectspertinenttothetireindustryandwithinthescopeofASTMCommitteeF-9.Itgivesdefinitions,explainsthepotentialuseofprecisionforstandardtestmethodsandgivestherequirementsforinterlaboratoryorinter-test-siteprograms.Thecalculationalgorithmsfordeterminingpreci-sionandtheformatforexpressingprecisionarealsogiven.2.ReferencedDocuments2.1ASTMStandards:E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaT...
