The NIST Reference on Constants, Units and Uncertainty

Uncertainty of Measurement Results
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Sources The information on evaluating and expressing measurement uncertainty within this reference is adapted from NIST Technical Note 1297. The publication TN 1297, prepared by B.N. Taylor and C.E. Kuyatt and entitled Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results, is in turn based on the comprehensive International Organization for Standardization (ISO) publication, Guide to the Expression of Uncertainty in Measurement. Users may access TN 1297 online in a pdf version or in an html version, or order it at no charge for postal delivery. They may also purchase the ISO Guide.
Background Background information on the development of the ISO Guide, its worldwide adoption, NIST TN 1297, and the NIST policy on expressing measurement uncertainty is given in the section International and U.S. perspectives on measurement uncertainty.
Related information Note also that a companion document to the ISO Guide, or GUM, was prepared by ISO/TAG 4/WG 1 and published in 1993 by ISO in the name of the same seven international organizations in whose name the GUM was published. It is entitled International Vocabulary of Basic and General Terms in Metrology, or VIM, and gives the definitions of many important terms relevant to the field of measurement (a few of these definitions are reprinted in the GUM and in TN 1297). Like the GUM, the VIM may be purchased.


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