ASTM_D_6674_-_01_2013.pdf

Designation:D667401(Reapproved 2013)Standard Guide forProficiency Test Program for Fabrics1This standard is issued under the fixed designation D6674;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONProficiency testing is the use of interlaboratory test comparisons to determine the performance ofindividual laboratories for specific tests and to monitor the consistency and comparability of alaboratorys test data.Participation in proficiency testing programs provides laboratories with an objective means ofassessing and demonstrating the reliability of the data they are producing.Although there are severaltypes of proficiency testing programs,they all share the common feature of the comparison of testresults obtained by two or more laboratories.One of the main uses of proficiency testing programs is to assess laboratories ability to performtests competently.This will involve the preparation of the test specimens,calibrating or validating thetesting equipment,performing the tests and reporting the data.Bodies assessing the technical competence of testing laboratories normally require or expectsatisfactory participation in proficiency testing as evidence of a laboratorys ability to produce reliabletest results.1.Scope1.1 This guide outlines the Proficiency Test Program forFabrics.Elements for planning the proficiency test program,selecting the sample fabrics to be used,the testing protocol,and the calculations for the data to be reported are included inthis practice.1.2 The planning of the proficiency test program requires ageneral knowledge of testing of textile fabrics and statisticalprinciples included in the analysis of the data.1.3 This guide is designed to meet the quality systemsproficiency and competence requirements of participating labo-ratories.This program is not accredited to any internationalstandard.1.4 The instructions in this guide follow the logic of fullscale laboratory tests as described in Practice D2904 and GuideE1301,except with this new guide placing its emphasis onproficiency testing.1.5 Procedures given in this guide are applicable to methodsbased on the measurement of discrete measurement data andgrades or scores.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD737 Test Method for Air Permeability of Textile FabricsD1230 Test Method for Flammability of Apparel Textiles(Withdrawn 2010)3D2261 Test Method for Tearing Strength of Fabrics by theTongue(Single Rip)Procedure(Constant-Rate-of-Extension Tensile Testing Machine)D2904 Practice for Interlaboratory Testing of a Textile TestMethod that Produces Normally Distributed Data(With-drawn 2008)3D2906 Practice for Statements on Precision and Bias forTextiles(Withdrawn 2008)3D3775 Test Method for Warp(End)and Filling(Pick)Countof Woven FabricsD5034 Test Method for Breaking Strength and Elongation ofTextile Fabrics(Grab Test)D5035 Test Method for Breaking Force and Elongation ofTextile Fabrics(Strip Method)D6545 Test Method for Flammability of Textiles Used in1This guide is under the jurisdiction of ASTM Committee D13 on Textiles andis the direct responsibility of Subcommittee D13.60 on Fabric Test Methods,Specific.Current edition approved July 1,2013.Published September 2013.Originallyapproved in 2001.Last previous edition approved in 2009 as D667401(2009)1.DOI:10.1520/D6674-01R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Childrens SleepwearE1301 Guide for Proficiency Testing by InterlaboratoryComparisons(Withdrawn 2012)33.Terminology3.1 The following terms are relevant to this standard:accuracy,of a test method;batch sample;bias,in statistics;calibrate;precision;precision,under conditions of between-laboratory precision;proficiency testing;program coordinator;repeatability,in statistics;reproducibility,in statistics;sample;specimen;test result;testing laboratory.3.2 For definitions of textile and statistical terms used in thispractice,and discussions of their use,refer to TerminologyD123 and appropriate textbooks on statistics.4.Significance and Use4.1 Proficiency testing is a means of securing estimates ofthe variability of results obtained by different laboratoriestesting homogeneous materials taken from batch samples whenfollowing procedures prescribed in a specific test method.4.1.1 For the purpose of this guide,homogeneous materialsare considered to be laboratory samples cut fro