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  • ISO 21748:2017

    Current The latest, up-to-date edition.

    Guidance for the use of repeatability, reproducibility and trueness estimates in measurement uncertainty evaluation

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English, French

    Published date:  24-04-2017

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)

    ISO 21748:2017 gives guidance for

    - evaluation of measurement uncertainties using data obtained from studies conducted in accordance with ISO 5725‑2, and

    - comparison of collaborative study results with measurement uncertainty (MU) obtained using formal principles of uncertainty propagation (see Clause 14).

    ISO 5725‑3 provides additional models for studies of intermediate precision. However, while the same general approach may be applied to the use of such extended models, uncertainty evaluation using these models is not incorporated in this document.

    ISO 21748:2017 is applicable to all measurement and test fields where an uncertainty associated with a result has to be determined.

    ISO 21748:2017 does not describe the application of repeatability data in the absence of reproducibility data.

    ISO 21748:2017 assumes that recognized, non-negligible systematic effects are corrected, either by applying a numerical correction as part of the method of measurement, or by investigation and removal of the cause of the effect.

    The recommendations in this document are primarily for guidance. It is recognized that while the recommendations presented do form a valid approach to the evaluation of uncertainty for many purposes, it is also possible to adopt other suitable approaches.

    In general, references to measurement results, methods and processes in this document are normally understood to apply also to testing results, methods and processes.

    General Product Information - (Show below) - (Hide below)

    Development Note Supersedes ISO TS 21748. (10/2010) Supersedes ISO/DIS 21748. (04/2017)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    16/30313874 DC : 0 BS ISO 4094 - PAPER, BOARD, AND PULPS - GENERAL REQUIREMENTS FOR THE COMPETENCE OF LABORATORIES AUTHORIZED FOR THE ISSUE OF OPTICAL REFERENCE TRANSFER STANDARDS OF LEVEL 3
    I.S. EN ISO 14720-2:2013 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 2: INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY (ICP/OES) OR ION CHROMATOGRAPHY AFTER BURNING IN AN OXYGEN FLOW (ISO 14720-2:2013)
    13/30260189 DC : 0 BS ISO 16900-12 - RESPIRATORY PROTECTIVE DEVICES - METHODS OF TEST AND TEST EQUIPMENT - PART 12: DETERMINATION OF VOLUME-AVERAGED WORK OF BREATHING AND PEAK RESPIRATORY PRESSURES
    13/30271561 DC : 0 BS ISO 16900-9 - RESPIRATORY PROTECTIVE DEVICES - METHODS OF TEST AND TEST EQUIPMENT - PART 9: DETERMINATION OF THE CARBON DIOXIDE CONTENT OF INHALED AIR
    DIN EN ISO 16995:2015-05 SOLID BIOFUELS - DETERMINATION OF THE WATER SOLUBLE CHLORIDE, SODIUM AND POTASSIUM CONTENT (ISO 16995:2015)
    ISO/TS 21362:2018 Nanotechnologies Analysis of nano-objects using asymmetrical-flow and centrifugal field-flow fractionation
    BS ISO 4094:2017 Paper, board and pulps. General requirements for the competence of laboratories authorized for the issue of optical reference transfer standards of level 3
    I.S. EN ISO 14720-1:2013 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 1: INFRARED MEASUREMENT METHODS (ISO 14720-1:2013)
    S.R. CEN/TS 16800:2015 GUIDELINE FOR THE VALIDATION OF PHYSICO-CHEMICAL ANALYTICAL METHODS
    BS ISO 6358-2:2013 PNEUMATIC FLUID POWER - DETERMINATION OF FLOW-RATE CHARACTERISTICS OF COMPONENTS USING COMPRESSIBLE FLUIDS - PART 2: ALTERNATIVE TEST METHODS
    ISO 14720-1:2013 Testing of ceramic raw and basic materials — Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials — Part 1: Infrared measurement methods
    CEN/TS 16800 : 2015 GUIDELINE FOR THE VALIDATION OF PHYSICO-CHEMICAL ANALYTICAL METHODS
    DIN EN ISO 14720-2:2013-06 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 2: INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY (ICP/OES) OR ION CHROMATOGRAPHY AFTER BURNING IN AN OXYGEN FLOW (ISO 14720-2:2013)
    BS ISO 26367-2:2017 Guidelines for assessing the adverse environmental impact of fire effluents Methodology for compiling data on environmentally significant emissions from fires
    I.S. EN ISO 16995:2015 SOLID BIOFUELS - DETERMINATION OF THE WATER SOLUBLE CHLORIDE, SODIUM AND POTASSIUM CONTENT (ISO 16995:2015)
    BS EN ISO 14720-2:2013 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 2: INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY (ICP/OES) OR ION CHROMATOGRAPHY AFTER BURNING IN AN OXYGEN FLOW
    15/30295576 DC : 0 BS ISO 16331-1 - OPTICS AND OPTICAL INSTRUMENTS - LABORATORY PROCEDURES FOR TESTING SURVEYING AND CONSTRUCTION INSTRUMENTS - PART 1: PERFORMANCE OF HANDHELD LASER DISTANCE METERS
    DIN ISO 13067 E : 2015 MICROBEAM ANALYSIS - ELECTRON BACKSCATTER DIFFRACTION - MEASUREMENT OF AVERAGE GRAIN SIZE (ISO 13067:2011)
    PD ISO/TS 17822-1:2014 IN VITRO DIAGNOSTIC TEST SYSTEMS - QUALITATIVE NUCLEIC ACID-BASED IN VITRO EXAMINATION PROCEDURES FOR DETECTION AND IDENTIFICATION OF MICROBIAL PATHOGENS - PART 1: GENERAL REQUIREMENTS, TERMS AND DEFINITIONS
    ISO 16900-3:2012 Respiratory protective devices — Methods of test and test equipment — Part 3: Determination of particle filter penetration
    ISO 6358-2:2013 Pneumatic fluid power Determination of flow-rate characteristics of components using compressible fluids Part 2: Alternative test methods
    NF ISO 13067 : 2012 MICROBEAM ANALYSIS - ELECTRON BACKSCATTER DIFFRACTION - MEASUREMENT OF AVERAGE GRAIN SIZE
    14/30230935 DC : 0 BS EN ISO 4126-11 - SAFETY DEVICES FOR PROTECTION AGAINST EXCESSIVE PRESSURE - PART 11: PERFORMANCE TESTING
    BS ISO 16900-1:2014 Respiratory protective devices. Methods of test and test equipment Determination of inward leakage
    ISO/TS 17822-1:2014 In vitro diagnostic test systems Qualitative nucleic acid-based in vitro examination procedures for detection and identification of microbial pathogens Part 1: General requirements, terms and definitions
    BS EN ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories
    ISO 26367-2:2017 Guidelines for assessing the adverse environmental impact of fire effluents — Part 2: Methodology for compiling data on environmentally significant emissions from fires
    UNI EN ISO 14720-2 : 2013 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 2: INDUCTIVELY COUPLED PLASMA OPTICAL EMISSION SPECTROMETRY (ICP/OES) OR ION CHROMATOGRAPHY AFTER BURNING IN AN OXYGEN FLOW
    UNI EN ISO 14720-1 : 2013 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 1: INFRARED MEASUREMENT METHODS
    I.S. EN 482:2012 WORKPLACE EXPOSURE - GENERAL REQUIREMENTS FOR THE PERFORMANCE OF PROCEDURES FOR THE MEASUREMENT OF CHEMICAL AGENTS
    ISO 20581:2016 Workplace air General requirements for the performance of procedures for the measurement of chemical agents
    ISO 16900-11:2013 Respiratory protective devices — Methods of test and test equipment — Part 11: Determination of field of vision
    BS ISO 20581:2016 (published 2017-02) Workplace air. General requirements for the performance of procedures for the measurement of chemical agents
    PD CEN/TS 16800:2015 GUIDELINE FOR THE VALIDATION OF PHYSICO-CHEMICAL ANALYTICAL METHODS
    ISO 16900-1:2014 Respiratory protective devices Methods of test and test equipment Part 1: Determination of inward leakage
    BS ISO 16331-1:2017 Optics and optical instruments. Laboratory procedures for testing surveying and construction instruments Performance of handheld laser distance meters
    14/30296739 DC : 0 BS EN 482:2012/A1 - WORKPLACE EXPOSURE - GENERAL REQUIREMENTS FOR THE PERFORMANCE OF PROCEDURES FOR THE MEASUREMENT OF CHEMICAL AGENTS
    11/30218530 DC : DRAFT FEB 2011 BS ISO 16331-1 - OPTICS AND OPTICAL INSTRUMENTS - LABORATORY PROCEDURES FOR TESTING SURVEYING AND CONSTRUCTION INSTRUMENTS - PART 1: PERFORMANCE OF HANDHELD LASER DISTANCE METERS
    I.S. EN ISO 16994:2016 SOLID BIOFUELS - DETERMINATION OF TOTAL CONTENT OF SULFUR AND CHLORINE (ISO 16994:2016)
    DIN ISO 11352:2013-03 WATER QUALITY - ESTIMATION OF MEASUREMENT UNCERTAINTY BASED ON VALIDATION AND QUALITY CONTROL DATA (ISO 11352:2012)
    DIN EN ISO 14720-1:2013-06 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 1: INFRARED MEASUREMENT METHODS (ISO 14720-1:2013)
    BS ISO 13067:2011 MICROBEAM ANALYSIS - ELECTRON BACKSCATTER DIFFRACTION - MEASUREMENT OF AVERAGE GRAIN SIZE
    ISO 6358-1:2013 Pneumatic fluid power — Determination of flow-rate characteristics of components using compressible fluids — Part 1: General rules and test methods for steady-state flow
    DIN EN 482:2015-12 Workplace exposure - General requirements for the performance of procedures for the measurement of chemical agents (includes Amendment A1:2015)
    UNE-EN ISO 16995:2015 Solid biofuels - Determination of the water soluble chloride, sodium and potassium content (ISO 16995:2015)
    CSA ISO 16995 : 2015 SOLID BIOFUELS - DETERMINATION OF THE WATER SOLUBLE CHLORIDE, SODIUM AND POTASSIUM CONTENT
    IEEE/ANSI C63.5-2017 ELECTROMAGNETIC COMPATIBILITY - RADIATED EMISSION MEASUREMENTS IN ELECTROMAGNETIC INTERFERENCE (EMI) CONTROL - CALIBRATION AND QUALIFICATION OF ANTENNAS (9 KHZ TO 40 GHZ)
    ISO 11352:2012 Water quality — Estimation of measurement uncertainty based on validation and quality control data
    BS ISO 16900-11:2013 Respiratory protective devices. Methods of test and test equipment Determination of field of vision
    BS EN ISO 16995:2015 SOLID BIOFUELS - DETERMINATION OF THE WATER SOLUBLE CHLORIDE, SODIUM AND POTASSIUM CONTENT
    DIN ISO 13067:2015-12 Microbeam analysis - Electron backscatter diffraction - Measurement of average grain size (ISO 13067:2011)
    DIN EN ISO 16995 E : 2015 SOLID BIOFUELS - DETERMINATION OF THE WATER SOLUBLE CHLORIDE, SODIUM AND POTASSIUM CONTENT (ISO 16995:2015)
    ISO 4094:2017 Paper, board and pulps — General requirements for the competence of laboratories authorized for the issue of optical reference transfer standards of level 3
    ISO 13067:2011 Microbeam analysis Electron backscatter diffraction Measurement of average grain size
    ISO 1996-2:2017 Acoustics — Description, measurement and assessment of environmental noise — Part 2: Determination of sound pressure levels
    ISO 16331-1:2017 Optics and optical instruments — Laboratory procedures for testing surveying and construction instruments — Part 1: Performance of handheld laser distance meters
    ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories
    BS EN 482 : 2012 WORKPLACE EXPOSURE - GENERAL REQUIREMENTS FOR THE PERFORMANCE OF PROCEDURES FOR THE MEASUREMENT OF CHEMICAL AGENTS
    UNE-EN 482:2012 Workplace exposure - General requirements for the performance of procedures for the measurement of chemical agents
    ISO 14720-2:2013 Testing of ceramic raw and basic materials — Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials — Part 2: Inductively coupled plasma optical emission spectrometry (ICP/OES) or ion chromatography after burning in an oxygen flow
    ISO 16995:2015 Solid biofuels Determination of the water soluble chloride, sodium and potassium content
    ISO 16994:2016 Solid biofuels — Determination of total content of sulfur and chlorine
    EN ISO 16995:2015 Solid biofuels - Determination of the water soluble chloride, sodium and potassium content (ISO 16995:2015)
    EN ISO 14720-1:2013 Testing of ceramic raw and basic materials - Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials - Part 1: Infrared measurement methods (ISO 14720-1:2013)
    EN ISO 14720-2:2013 Testing of ceramic raw and basic materials - Determination of sulfur in powders and granules of non-oxidic ceramic raw and basic materials - Part 2: Inductively coupled plasma optical emission spectrometry (ICP/OES) or ion chromatography after burning in an oxygen flow (ISO 14720-2:2013)
    EN ISO 16994:2016 Solid biofuels - Determination of total content of sulfur and chlorine (ISO 16994:2016)
    BS EN ISO 16994:2015 SOLID BIOFUELS - DETERMINATION OF TOTAL CONTENT OF SULFUR AND CHLORINE (ISO 16994:2016)
    BS ISO 6358-1:2013 Pneumatic fluid power. Determination of flow-rate characteristics of components using compressible fluids General rules and test methods for steady-state flow
    BS EN ISO 14720-1:2013 TESTING OF CERAMIC RAW AND BASIC MATERIALS - DETERMINATION OF SULFUR IN POWDERS AND GRANULES OF NON-OXIDIC CERAMIC RAW AND BASIC MATERIALS - PART 1: INFRARED MEASUREMENT METHODS (ISO 14720-1:2013)
    BS ISO 16900-3:2012 Respiratory protective devices. Methods of test and test equipment Determination of particle filter penetration
    BS ISO 11352:2012 Water quality. Estimation of measurement uncertainty based on validation and quality control data
    15/30326686 DC : 0 BS ISO 20581 - WORKPLACE AIR - GENERAL REQUIREMENTS FOR THE PERFORMANCE OF PROCEDURES FOR THE MEASUREMENT OF CHEMICAL AGENTS
    18/30346454 DC : 0 BS ISO 21832 - WORKPLACE AIR - PROCEDURES FOR DETERMINATION OF METALS AND METALLOIDS IN AIRBORNE PARTICLES
    ANSI C63.23:2012 GUIDE FOR ELECTROMAGNETIC COMPATIBILITY - COMPUTATIONS AND TREATMENT OF MEASUREMENT UNCERTAINTY
    EN 482:2012+A1:2015 Workplace exposure - General requirements for the performance of procedures for the measurement of chemical agents

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
    ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions
    ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method
    ISO Guide 33:2015 Reference materials Good practice in using reference materials
    FD X07 021 : 99 FD FUNDAMENTAL STANDARDS - METROLOGY AND APPLICATION OF THE STATISTICS - HELP TO THE PROCESS FOR THE ESTIMATION AND THE USE OF THE MEASUREMENT AND TEST RESULTS UNCERTAINTY
    ISO 10576-1:2003 Statistical methods — Guidelines for the evaluation of conformity with specified requirements — Part 1: General principles
    ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values
    ISO 5725-4:1994 Accuracy (trueness and precision) of measurement methods and results Part 4: Basic methods for the determination of the trueness of a standard measurement method
    ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
    ISO 3534-2:2006 Statistics Vocabulary and symbols Part 2: Applied statistics
    ISO/IEC 17043:2010 Conformity assessment — General requirements for proficiency testing
    ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
    ISO 7870-4:2011 Control charts Part 4: Cumulative sum charts
    ISO 3534-3:2013 Statistics Vocabulary and symbols Part 3: Design of experiments
    ISO 5725-5:1998 Accuracy (trueness and precision) of measurement methods and results — Part 5: Alternative methods for the determination of the precision of a standard measurement method
    ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
    ISO 3534-1:2006 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability
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