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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Utility of measurement uncertainty
   4.1 General
   4.2 Utility related to a target measurement
        uncertainty
   4.3 Utility for laboratory
   4.4 Utility for clinician
   4.5 Role of metrological traceability
5 Fundamental concepts of measurement
   5.1 Measurement
   5.2 Measurement error and measurement uncertainty
   5.3 Defining a measurand
6 Practical process of calculating measurement uncertainty
   6.1 Sources of measurement uncertainty
   6.2 Considerations in defining a measurand
   6.3 Target measurement uncertainty
   6.4 Recalculation of measurement uncertainty
7 Summary procedure for calculating and expressing measurement
   uncertainty
8 Reporting measurement uncertainty
   8.1 Records
   8.2 Terminology
   8.3 Summary reporting of best estimate of measurand, y,
        with combined standard measurement uncertainty,
        u[c](y)
   8.4 Summary reporting of best estimate of measurand,
        y, with expanded measurement uncertainty, U = ku[c](y)
   8.5 Significant digits and rounding
   8.6 Supplementary information
   8.7 Availability of data for measurement uncertainty
Annex A (normative) - Calculation of measurement uncertainty
        from a measurement model
   A.1 Measurement model, measurement function
   A.2 Evaluating probability distribution, best estimate,
        and standard measurement uncertainty
        A.2.1 Replicate measurements
        A.2.2 Specified limits
        A.2.3 Results from certificates
        A.2.4 Measurement results from previous measurements
   A.3 Calculating combined standard measurement uncertainty,
        covariance, and correlation coefficient
        A.3.1 Calculating combined standard measurement
              uncertainty
        A.3.2 Calculating covariance and correlation coefficient
   A.4 Calculating expanded measurement uncertainty, coverage
        probability, coverage factor, and coverage interval
Annex B (normative) - Simple measurement models - Measuring
        system, sampling, and intraindividual variation
   B.1 Measuring system
        B.1.1 Measurement model, measurement function
        B.1.2 Best estimates and standard measurement uncertainties
              of input quantities
        B.1.3 Best estimate and measurement uncertainty of output
              quantity
   B.2 Sampling
        B.2.1 Measurement model, measurement function
        B.2.2 Best estimates and standard measurement uncertainties
              of input quantities
        B.2.3 Best estimate and measurement uncertainty of
              output quantity
   B.3 Intraindividual variation
        B.3.1 Measurement model, measurement function
        B.3.2 Best estimates and standard measurement uncertainties
              of input quantities
        B.3.3 Best estimate and measurement uncertainty of output
              quantity
Annex C (informative) - Examples - Measurement uncertainty of
        measured quantity values
   C.1 Amount-of-substance concentration of glucose in plasma
        Plasma-Glucose; substance concentration NPU02192 Bottom-up
        approach
        C.1.1 Definition of measurand
        C.1.2 Measurement procedure
        C.1.3 Measurement function
        C.1.4 Evaluation of input quantities
        C.1.5 Sensitivity coefficients
        C.1.6 Combined standard measurement uncertainty
        C.1.7 Uncertainty budget
        C.1.8 Report of measurement result
   C.2 International Normalized Ratio (INR) for coagulation
        in plasma P-Coagulation, tissue factor-induced;
        relative time(actual/norm; INR; IRP 67/40; procedure)
        NPU01685
        C.2.1 Definition of measurand
        C.2.2 Measurement procedure
        C.2.3 Measurement function
        C.2.4 Evaluation of input quantities
        C.2.5 Sensitivity coefficients
        C.2.6 Combined standard measurement uncertainty
        C.2.7 Uncertainty budget
        C.2.8 Report of measurement result
Annex D (informative) - Measurement trueness and measurement
         precision
   D.1 Measurement precision
   D.2 Measurement trueness
Bibliography

ISO/TS 25680