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NIST Technical Note 1297
1994 Edition (Supersedes 1993 Edition)

Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results

Barry N. Taylor and Chris E. Kuyatt


Brief summary

A method of evaluating and expressing uncertainty in measurement adapted from NIST Technical Note 1297.

TN 1297 also available as a PDF file

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Contents

(Cover page)
Preface to the 1994 Edition
Foreword
1. Introduction
2. Classification of Components of Uncertainty
3. Type A Evaluation of Standard Uncertainty
4. Type B Evaluation of Standard Uncertainty
5. Combined Standard Uncertainty
6. Expanded Uncertainty
7. Reporting Uncertainty
8. References
Appendices
      A: Law of Propagation of Uncertainty
      B: Coverage Factors
      C: Statements of Uncertainty Associated with Measurement Results
      D: Clarification and Additional Guidance
D.1  Terminology
D.2  Identification of uncertainty components
D.3  Equation (A-2)
D.4  Measurand defined by the measurement method; characterization of test methods; simple calibration
D.5  tp and the quantile t1-α
D.6  Uncertainty and units of the SI; proper use of the SI and quantity and unit symbols
D.7  References