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  • BS ISO 5725-1:1994 (published 2000-03)

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    Accuracy (trueness and precision) of measurement methods and results General principles and definitions

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  15-03-2000

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    Committees responsible
    National foreword
    Foreword
    Introduction
    1 Scope
    2 Normative references
    3 Definitions
    4 Practical implications of the definitions for
        accuracy experiments
        4.1 Standard measurement method
        4.2 Accuracy experiment
        4.3 Identical test items
        4.4 Short intervals of time
        4.5 Participating laboratories
        4.6 Observation conditions
    5 Statistical model
        5.1 Basic model
        5.2 Relationship between the basic model and the
              precision
        5.3 Alternative models
    6 Experimental design considerations when estimating
        accuracy
        6.1 Planning of an accuracy experiment
        6.2 Standard measurement method
        6.3 Selection of laboratories for the accuracy
              experiment
        6.4 Selection of materials to be used for an
              accuracy experiment
    7 Utilization of accuracy data
        7.1 Publication of trueness and precision values
        7.2 Practical applications of trueness and
              precision values
    Annex A (normative) Symbols and abbreviations used in
             ISO 5725
    Annex B (normative) Charts of uncertainties for
             precision measures
    Annex C (informative) Bibliography
    Figure B.1 - The amount by which sr can be expected to
                 differ from the true value within a
                 probability level of 95 %
    Figure B.2 - The amount by which sR can be expected to
                 differ from the true value within a
                 probability level of 95 %
    Table 1 - Values showing the uncertainty of estimates
              of the repeatability and reproducibility
              standard deviations
    Table 2 - Values of A, the uncertainty of an estimate
              of the bias of the measurement method
    Table 3 - Values of AW, the uncertainty of the
              within-laboratory bias
    Table 4 - Example of method of reporting standard
              deviations

    Abstract - (Show below) - (Hide below)

    Outlines the general principles to be understood when assessing accuracy of measurement methods and results. Concerned exclusively with measurement methods which yield measurements on a continuous scale and give a single value as the test result. Defines values which describe, in quantitative terms, the ability of a measurement method to give a correct result (trueness) or to replicate a given result (precision). Coverage includes: practical implications of the definitions for accuracy experiments; experimental design considerations when estimating accuracy; relationship between the basic model and the precision. Also gives definitions.

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

    Committee SS/6
    Development Note Together with BS ISO 5725-2, BS ISO 5725-3, BS ISO 5725-4, BS ISO 5725-5 and BS ISO 5725-6, supersedes BS 5497-1(1987) Supersedes 90/97778 DC (03/2002)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

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

    BS 4401-6(1996) : 1996 METHODS OF TEST FOR MEAT AND MEAT PRODUCTS - PART 6: DETERMINATION OF CHLORIDE CONTENT (VOLHARD METHOD)
    BS DD260(2003) : 2003 WATER QUALITY - ENUMERATION OF MICRO-ORGANISMS IN WATER SAMPLES - GUIDANCE ON THE ESTIMATION OF VARIATION OF RESULTS WITH PARTICULAR REFERENCE TO THE CONTRIBUTION OF UNCERTAINTY OF MEASUREMENT
    BS 6200-5(1997) : 1997 SAMPLING AND ANALYSIS OF IRON, STEEL AND OTHER FERROUS METALS - GUIDELINES ON STATISTICAL PROCEDURES
    DD ENV 12140 : 1997 METHOD FOR DETERMINATION OF STABLE CARBON ISOTOPE RATIO ([13]C/[12]C) OF SUGARS FROM FRUIT JUICES, USING ISOTOPE RATIO MASS SPECTROMETRY
    DD ENV 12142 : 1997 METHOD FOR DETERMINATION OF STABLE HYDROGEN ISOTOPE RATIO ([2]H/[1]H) OF WATER FROM FRUIT JUICES, USING ISOTOPE RATIO MASS SPECTROMETRY
    BS 4401-5(1996) : 1996 METHODS OF TEST FOR MEAT AND MEAT PRODUCTS - DETERMINATION OF FREE FAT CONTENT
    DD ENV 12141 : 1997 METHOD FOR DETERMINATION OF STABLE OXYGEN ISOTOPE RATIO ([18]O/[16]O) OF WATER FROM FRUIT JUICES, USING ISOTOPE RATIO MASS SPECTROMETRY
    BS PD6682-9(2003) : 2003 AGGREGATES - PART 9: GUIDANCE ON THE USE OF EUROPEAN TEST METHOD STANDARDS
    BS 2782-5.532A(1997) : 1997 METHODS OF TESTING PLASTICS - OPTICAL AND COLOUR PROPERTIES, WEATHERING - PLASTICS - DETERMINATION OF THE TOTAL LUMINOUS TRANSMITTANCE OF TRANSPARENT MATERIALS - SINGLE-BEAM INSTRUMENT
    BS 903-2(1997) : 1997 PHYSICAL TESTING OF RUBBER - GUIDE TO THE APPLICATION OF STATISTICS TO RUBBER TESTING
    BS 8496(2007) : 2007 WATER QUALITY - ENUMERATION OF MICRO-ORGANISMS IN WATER SAMPLES - GUIDANCE ON THE ESTIMATION OF VARIATION OF RESULTS WITH PARTICULAR REFERENCE TO THE CONTRIBUTION OF UNCERTAINTY OF MEASUREMENT
    BS 6995(1997) : 1997 METHOD FOR EVALUATION OF VULCANIZATION CHARACTERISTICS OF STYRENE-BUTADIENE RUBBER (SBR, YSBR) (EMULSION AND SOLUTION-POLYMERIZED TYPES)
    BS 6043-2.11(1995) : 1995 METHODS OF SAMPLING AND TEST FOR CARBONACEOUS MATERIALS USED IN ALUMINIUM MANUFACTURE - ELECTRODE COKE - DETERMINATION OF VOLATILE MATTER CONTENT
    S.R. 24:2004 GUIDANCE ON THE USE AND APPLICATION OF EUROPEAN TEST METHOD STANDARDS FOR AGGREGATES
    BS 1427(2009) : 2009 GUIDE TO ON-SITE TEST METHODS FOR THE ANALYSIS OF WATERS
    BS 4325-12(1996) : 1996 METHODS FOR ANALYSIS OF OILSEED RESIDUES - DETERMINATION OF GLUCOSINOLATES CONTENT BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY
    BS EN 1528-1 : 1997 FATTY FOOD - DETERMINATION OF PESTICIDES AND POLYCHLORINATED BIPHENYLS (PCBS) - GENERAL
    BS EN 1376 : 1997 FOODSTUFFS - DETERMINATION OF SACCHARIN IN TABLE TOP SWEETENER PREPARATIONS - SPECTROMETRIC METHOD
    BS EN ISO 11214:1996 (published 1996-12) Modified starch. Determination of carboxyl group content of oxidized starch
    BS EN 12147 : 1997 METHOD FOR DETERMINATION OF TITRATABLE ACIDITY OF FRUIT AND VEGETABLE JUICES
    BS EN 12143 : 1997 FRUIT AND VEGETABLE JUICES - ESTIMATION OF SOLUBLE SOLIDS CONTENT - REFRACTOMETRIC METHOD
    BS EN 1378 : 1997 FOODSTUFFS - DETERMINATION OF ASPARTAME IN TABLE TOP SWEETENER PREPARATIONS - METHOD BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
    BS EN 12146 : 1997 FRUIT AND VEGETABLE JUICES - ENZYMATIC DETERMINATION OF SUCROSE CONTENT - NADP SPECTROMETRIC METHOD
    BS EN 12148 : 1997 FRUIT AND VEGETABLE JUICES - DETERMINATION OF HESPERIDIN AND NARINGIN IN CITRUS JUICES - METHOD USING HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
    BS EN 12145 : 1997 FRUIT AND VEGETABLE JUICES - DETERMINATION OF TOTAL DRY MATTER - GRAVIMETRIC METHOD WITH LOSS OF MASS ON DRYING
    BS EN ISO 13468-1:1997 PLASTICS - DETERMINATION OF THE TOTAL LUMINOUS TRANSMITTANCE OF TRANSPARENT MATERIALS - PART 1: SINGLE-BEAM INSTRUMENT
    BS EN 12144 : 1997 FRUIT AND VEGETABLE JUICES - DETERMINATION OF TOTAL ALKALINITY OF ASH - TITRIMETRIC METHOD
    BS EN 1379 : 1997 FOODSTUFFS - DETERMINATION OF CYCLAMATE AND SACCHARIN IN LIQUID TABLE TOP SWEETENER PREPARATIONS - METHOD BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY
    BS EN 1377 : 1997 FOODSTUFFS - DETERMINATION OF ACESULFAME K IN TABLE TOP SWEETENER PREPARATIONS - SPECTROMETRIC METHOD

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

    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
    ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results Part 6: Use in practice of accuracy values
    ISO Guide 35:2017 Reference materials Guidance for characterization and assessment of homogeneity and stability
    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 3534-2:2006 Statistics Vocabulary and symbols Part 2: Applied statistics
    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 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 3534-1:2006 Statistics Vocabulary and symbols Part 1: General statistical terms and terms used in probability
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