Designation:D7372−21AnAmericanNationalStandardStandardGuideforAnalysisandInterpretationofProficiencyTestProgramResults1ThisstandardisissuedunderthefixeddesignationD7372;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisguidecoverstheevaluationandinterpretationofproficiencytestprogram(PTP)results.Forproficiencytestprogramparticipants,thisguidedescribesproceduresforassessingparticipants’resultsrelativetothecollectivePTprogramresultsandpotentiallyimprovingthelaboratory’stestingperformancebasedontheassessmentoffindingsandinsights.ForthecommitteesresponsibleforthetestmethodsincludedinPTprograms,thisguidedescribesproceduresforassessingindustry’sabilitytoperformtestmethodsandforpotentiallyidentifyingopportunitiesforimprovements.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4175TerminologyRelatingtoPetroleumProducts,LiquidFuels,andLubricantsD6259PracticeforDeterminationofaPooledLimitofQuantitationforaTestMethodD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMeasurementSystemPerformanceD6617PracticeforLaboratoryBiasDetectionUsingSingleTestResultfromStandardMaterialD6792PracticeforQualityManagementSystemsinPetro-leumProducts,LiquidFuels,andLubricantsTestingLaboratoriesD7915Pr...
