Designation:D6674−01(Reapproved2013)StandardGuideforProficiencyTestProgramforFabrics1ThisstandardisissuedunderthefixeddesignationD6674;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONProficiencytestingistheuseofinterlaboratorytestcomparisonstodeterminetheperformanceofindividuallaboratoriesforspecifictestsandtomonitortheconsistencyandcomparabilityofalaboratory’stestdata.Participationinproficiencytestingprogramsprovideslaboratorieswithanobjectivemeansofassessinganddemonstratingthereliabilityofthedatatheyareproducing.Althoughthereareseveraltypesofproficiencytestingprograms,theyallsharethecommonfeatureofthecomparisonoftestresultsobtainedbytwoormorelaboratories.Oneofthemainusesofproficiencytestingprogramsistoassesslaboratories’abilitytoperformtestscompetently.Thiswillinvolvethepreparationofthetestspecimens,calibratingorvalidatingthetestingequipment,performingthetestsandreportingthedata.Bodiesassessingthetechnicalcompetenceoftestinglaboratoriesnormallyrequireorexpectsatisfactoryparticipationinproficiencytestingasevidenceofalaboratory’sabilitytoproducereliabletestresults.1.Scope1.1ThisguideoutlinestheProficiencyTestProgramforFabrics.Elementsforplanningtheproficiencytestprogram,selectingthesamplefabricstobeused,thetestingprotocol,andthecalculationsforthedatatobereportedareincludedinthispractice.1.2Theplanningoftheproficiencytestprogramrequiresageneralknowledgeoftestingoftextilefabricsandstatisticalprinciplesincludedintheanalysisofthedata.1.3Thisguideisdesignedtomeetthequalitysystemsproficiencyandcompetencerequirementsofparticipatinglabo-ratories.Thisprogramisnotaccreditedtoanyinternationalstandard.1.4TheinstructionsinthisguidefollowthelogicoffullscalelaboratorytestsasdescribedinPracticeD2904andGuideE1301,exceptwiththisnewguideplacingitsemphasisonprof...
