Designation:D4270–95(Reapproved2001)StandardGuideforUsingExistingPracticesinDevelopingandWritingTestMethods1ThisstandardisissuedunderthefixeddesignationD4270;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguideisintendedtoassisttaskgroupsinthepreparationofatestmethod.ItcanhelpthetaskgroupuseexistingstatisticallyrelatedASTMpracticesmoreeffectivelyduringthedevelopmentandwritingofthetestmethod.1.2SomeoftheessentialactivitiesthatshouldoccurduringthedevelopmentofanewtestmethodarenotinexistingorproposedpracticesunderthejurisdictionofASTMSubcom-mitteeD13.93onStatistics.Thisguideincludesabriefexplanationofhowsuchactivitiesshouldbecarriedout.1.3Thisguideisapplicabletopropertiesthatareevaluatedbybothparametricandnonparametricmethodsofestimation.Theinstructionsonpropertiesthatarebestevaluatedbynonparametricmethodsarelesscompletethanthoseforpropertiesthatareevaluatedbyparametricmethods.2.ReferencedDocuments2.1ASTMStandards:D123TerminologyRelatingtoTextiles2D2904PracticeforInterlaboratoryTestingofaTextileTestMethodthatProducesNormallyDistributedData2D2905PracticeforStatementsonNumberofSpecimensforTextiles2D2906PracticeforStatementsonPrecisionandBiasforTextiles2D3777PracticeforWritingSpecificationsforTextiles3D4271PracticeforWritingStatementsonSamplinginTestMethodsforTextiles3D4356PracticeforEstablishingConsistentTestMethodTolerances4D4467PracticeforInterlaboratoryTestingofaTextileTestMethodthatProducesNon-NormallyDistributedData3D4853GuideforReducingTestVariability3D4854GuideforEstimatingtheMagnitudeofVariabilityfromExpectedSourcesinSamplingPlans3D4855PracticeforComparingTestMethods3E456TerminologyRelatingtoQualityandStatistics4E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod42.2ASTMAdjuncts:5TEX-PACNOTE1—TEX-PACisagroup...
