ASTM E2093-12

Standard Guide for Optimizing, Controlling and Assessing Test Method Uncertainties from Multiple Workstations in the Same Laboratory Organization

SIGNIFICANCE AND USE
Many competent analytical laboratories comply with accepted quality system requirements. When using standard test methods, their test results on the same sample should agree with those from other similar laboratories within the reproducibility estimates index (R) published in the standard. Reproducibility estimates are generated as part of the interlaboratory studies (ILS), of the type described in Practice E1601. Competent laboratories participate in proficiency tests, such as those conducted in accordance with Practice E2027, to confirm that they perform consistently over time. In both ILS and proficiency testing protocols, it is generally assumed that only one work station is used to generate the data.
Many laboratories have workloads, or logistical requirements, or both, that dictate the use of multiple work stations. Some have multiple stations in the same area (central laboratory format). Other stations are scattered throughout a facility (at-line laboratory format) and in some cases may even reside at different facilities. Often, analysis reports do not identify the workstation used for the testing, even if workstations differ in their testing uncertainties. Problems can arise if clients mistakenly attribute variation in report values to process rather than workstation variability. These problems can be minimized if the laboratory organization determines the overall uncertainty associated with results reported from multiple workstations and assesses the significance of the analytical uncertainty to the production process.
This guide describes a protocol for efficiently optimizing and controlling variability in test results from different workstations used to perform the same test. It harmonizes calibration and control protocols, thereby providing the same level of measurement traceability and control to all workstations. It streamlines documentation and training requirements, thereby facilitating flexibility in personnel assignments. Finally, it offers an...
SCOPE
1.1 This guide describes a protocol for optimizing, controlling, and reporting test method uncertainties from multiple workstations in the same laboratory organization. It does not apply when different test methods, dissimilar instruments, or different parts of the same laboratory organization function independently to validate or verify the accuracy of a specific analytical measurement.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-May-2012
• ICS: 03.120.30 - Application of statistical methods
• Technical Committee: E01 - Analytical Chemistry for Metals, Ores, and Related Materials
• Drafting Committee: E01.22 - Laboratory Quality

Relations

• Replaces: ASTM E2093-05 - Standard Guide for Optimizing, Controlling and Reporting Test Method Uncertainties from Multiple Workstations in the Same Laboratory Organization
• Effective Date: 01-Jun-2012
• Replaced By: ASTM E2093-12(2016) - Standard Guide for Optimizing, Controlling and Assessing Test Method Uncertainties from Multiple Workstations in the Same Laboratory Organization
• Effective Date: 01-Dec-2016

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E2093 − 12
Standard Guide for
Optimizing, Controlling and Assessing Test Method
Uncertainties from Multiple Workstations in the Same
1
Laboratory Organization
This standard is issued under the fixed designation E2093; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope 2.2 ISO Standards:
ISO/IEC 17025General Requirements for the Competence
1.1 This guide describes a protocol for optimizing,
of Calibration and Testing Laboratories
controlling, and reporting test method uncertainties from mul-
ISO 9000Quality Management and Quality System Ele-
tiple workstations in the same laboratory organization. It does
ments
not apply when different test methods, dissimilar instruments,
2.3 Other Standards:
or different parts of the same laboratory organization function
4
Measurement Systems Analysis Reference Manual
independently to validate or verify the accuracy of a specific
analytical measurement.
3. Terminology
1.2 This standard does not purport to address all of the
3.1 Definitions—For definitions of terms used in this guide,
safety concerns, if any, associated with its use. It is the
refer to Terminology E135.
responsibility of the user of this standard to establish appro-
3.2 Definitions of Terms Specific to This Standard:
priate safety and health practices and determine the applica-
3.2.1 workstation, n—a combination of people and equip-
bility of regulatory limitations prior to use.
ment that executes a specific test method using a single
specifiedmeasuringdevicetoquantifyoneormoreparameters,
2. Referenced Documents
with each report value having an established estimated uncer-
2
2.1 ASTM Standards:
tainty that complies with the data quality objectives of the
E135Terminology Relating to Analytical Chemistry for
laboratory organization.
Metals, Ores, and Related Materials
E350Test Methods for Chemical Analysis of Carbon Steel,
4. Significance and Use
Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and
4.1 Many competent analytical laboratories comply with
Wrought Iron
accepted quality system requirements. When using standard
E415Test Method for Atomic Emission Vacuum Spectro-
testmethods,theirtestresultsonthesamesampleshouldagree
metric Analysis of Carbon and Low-Alloy Steel
with those from other similar laboratories within the reproduc-
E1329Practice forVerification and Use of Control Charts in
ibility estimates index (R) published in the standard. Repro-
Spectrochemical Analysis
ducibility estimates are generated as part of the interlaboratory
E1601Practice for Conducting an Interlaboratory Study to
studies (ILS), of the type described in Practice E1601. Com-
Evaluate the Performance of an Analytical Method
petent laboratories participate in proficiency tests, such as
E2027Practice for Conducting Proficiency Tests in the
thoseconductedinaccordancewithPracticeE2027,toconfirm
ChemicalAnalysisofMetals,Ores,andRelatedMaterials
that they perform consistently over time. In both ILS and
proficiency testing protocols, it is generally assumed that only
one work station is used to generate the data.
1
This guide is under the jurisdiction of ASTM Committee E01 on Analytical
ChemistryforMetals,Ores,andRelatedMaterialsandisthedirectresponsibilityof
Subcommittee E01.22 on Laboratory Quality.
3
CurrenteditionapprovedJune1,2012.PublishedJuly2012.Originallyapproved Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
in 2000. Last previous edition approved in 2005 as E2093–05. DOI: 10.1520/ 4th Floor, New York, NY 10036, www.ansi.org or from International Organization
E2093-12. for Standardization (ISO) at www.iso.ch.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Measurement Systems Analysis Reference Manual, Copyright 1990, 1995,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Chrysler Corporation, Ford Motor Company, and General Motors Corporation,
Standards volume information, refer to the standard’s Document Summary page on available from AIAG, 26200 Lahser Rd., Suite 200, Southfield, MI 48034–7100,
the ASTM website. www.aiag.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2093 − 12
4.2 Many laboratories have workloads, or logistical such as those required by ISO/IEC 17025. However, the
requirements, or both, that dictate the use of multiple work statistical calculations generated using this guide may provide
stations. Some have multiple stations in the same area (central ausefulestimateofoneTyp
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E2093–05 Designation:E2093–12
Standard Guide for
Optimizing, Controlling and ReportingAssessing Test
Method Uncertainties from Multiple Workstations in the
1
Same Laboratory Organization
This standard is issued under the fixed designation E2093; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This guide describes a protocol for optimizing, controlling, and reporting test method uncertainties from multiple
workstations in the same laboratory organization. It does not apply when different test methods, dissimilar instruments, or different
parts of the same laboratory organization function independently to validate or verify the accuracy of a specific analytical
measurement.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
E135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
E350 Test Methods for ChemicalAnalysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought
Iron
E415 Test Method for Atomic Emission Vacuum Spectrometric Analysis of Carbon and Low-Alloy Steel
E1329 Practice for Verification and Use of Control Charts in Spectrochemical Analysis
E1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method
E2027 Practice for Conducting Proficiency Tests in the Chemical Analysis of Metals, Ores, and Related Materials
3
2.2 ISO Standards:
ISO 17025ISO/IEC 17025 General Requirements for the Competence of Calibration andTesting Laboratories ISO 9000Quality
3
Management and Quality System Elements
ISO 9000 Quality Management and Quality System Elements
2.3 Other Standards:
4
Measurement Systems Analysis Reference Manual
3. Terminology
3.1 Definitions—For definitions of terms used in this guide, refer to Terminology E135.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 data quality objectives, n—a model used by the laboratory organization to specify the maximum error associated with a
report value, at a specified confidence level.
3.2.2laboratory organization, n—a business entity that provides similar types of measurements from more than one workstation
located in one or more laboratories, all of which operate under a unified quality system.
1
This guide is under the jurisdiction of ASTM Committee E01 on Analytical Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
Subcommittee E01.22 on Laboratory Quality.
Current edition approved MayJune 1, 2005.2012. Published July 2005.2012. Originally approved in 2000. Last previous edition approved in 20002005 as E2093 – 005.
DOI: 10.1520/E2093-05.10.1520/E2093-12.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, www.ansi.org or from International Organization for
Standardization (ISO) at www.iso.ch.
4
Quality Systems Requirements, Chrysler Corporation, Ford Motor Company, and General Motors Corporation—available from AIAG, 26200 Lahser Rd., Suite 200,
Southfield, MI 48034–7100.
4
Measurement Systems Analysis Reference Manual, Copyright 1990, 1995, Chrysler Corporation, Ford Motor Company, and General Motors Corporation, available from
AIAG, 26200 Lahser Rd., Suite 200, Southfield, MI 48034–7100, www.aiag.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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E2093–12
3.2.3maximum deviation, n—the maximum error associated with a report value, at a specified confidence level, for a given
concentration of a given element, determined by a specific method, throughout a laboratory organization.
3.2.4workstation, n—a combinat
...