ASTM_D_6689_-_01_2019e1.pdf

Designation:D668901(Reapproved 2019)1Standard Guide forOptimizing,Controlling,and Reporting Test MethodUncertainties from Multiple Workstations in the SameLaboratory Organization1This standard is issued under the fixed designation D6689;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.1NOTEReapproved with editorial changes throughout in March 2019.1.Scope1.1 This guide describes a protocol for optimizing,controlling,and reporting test method uncertainties from mul-tiple workstations in the same laboratory organization.It doesnot apply when different test methods,dissimilar instruments,or different parts of the same laboratory organization functionindependently to validate or verify the accuracy of a specificanalytical measurement.1.2 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD6091 Practice for 99%/95%Interlaboratory DetectionEstimate(IDE)for Analytical Methods with NegligibleCalibration ErrorD6512 Practice for Interlaboratory Quantitation EstimateE135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE415 Test Method for Analysis of Carbon and Low-AlloySteel by Spark Atomic Emission SpectrometryE1763 Guide for Interpretation and Use of Results fromInterlaboratory Testing of Chemical Analysis Methods(Withdrawn 2015)32.2 Other Documents:ISO/IEC 17025 General Requirements for the Competenceof Calibration and Testing Laboratories4MNL7-9TH ASTM Manual on Presentation of Data andControl ChartAnalysis,9th Edition,Prepared by Commit-tee E11 on Quality and Statistics23.Terminology3.1 DefinitionsFor definitions of terms used in this Guide,refer to Terminologies E135 and D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 laboratory organization,na business entity thatprovides similar types of measurements from more than oneworkstation located in one or more laboratories,all of whichoperate under the same quality system.NOTE1Key aspects of a quality system are covered in ISO/IEC 17025and include documenting procedures,application of statistical control tomeasurement processes and participation in proficiency testing.3.2.2 maximum deviation,nthe maximum error associatedwith a report value,at a specified confidence level,for a givenconcentration of a given element,determined by a specificmethod,throughout a laboratory organization.3.2.3 measurement quality objectives,na model used bythe laboratory organization to specify the maximum errorassociated with a report value,at a specified confidence level.3.2.4 workstation,na combination of people and equip-ment that executes a specific test method using a singlespecified measuring device to quantify one or more parameters,1This guide is under the jurisdiction of ASTM Committee D19 on Water and isthe direct responsibility of Subcommittee D19.02 on Quality Systems,Specification,and Statistics.Current edition approved March 15,2019.Published April 2019.Originallyapproved in 2001.Last previous edition approved in 2011 as D6689 01(2011).DOI:10.1520/D6689-01R19E01.2For 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.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 with each report value having an established estimated uncer-tainty that complies with the measurement quality objectives ofthe laboratory organization.4.Significance and Use4.1 Many analytical laboratories comply with acceptedquality system requirements such