BIPM - guides

Overview
Uncertainty in Measurement (GUM)
Vocabulary of Metrology (VIM)

The Joint Committee for Guides in Metrology (JCGM) has responsibility for the following two publications:

Guide to the Expression of Uncertainty in Measurement (known as the GUM); and

International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (known as the VIM).

The latest versions of these and related publications can be downloaded free of charge from the BIPM website.

In order to benefit fully from the hyperlinking between the documents, the reader is advised to download all JCGM documents presently available in one ZIP file.

The fundamental reference document is the Guide to the Expression of Uncertainty in Measurement (GUM):

	Evaluation of measurement data – Guide to the expression of uncertainty in measurement JCGM 100:2008 (GUM 1995 with minor corrections)
	Note: JCGM 100:2008 is also available in HTML form from the JCGM portal on ISO's website.

The JCGM Working Group 1 (JCGM-WG1) is producing a series of documents to accompany the GUM. The first five of these documents have been approved and are available for download as PDF files. Printed copies are available for purchase from ISO.

	Evaluation of measurement data – An introduction to the "Guide to the expression of uncertainty in measurement" and related documents JCGM 104:2009
	Evaluation of measurement data – Supplement 1 to the "Guide to the expression of uncertainty in measurement" – Propagation of distributions using a Monte Carlo method JCGM 101:2008
	Evaluation of measurement data – Supplement 2 to the "Guide to the expression of uncertainty in measurement" – Extension to any number of output quantities JCGM 102:2011
	Evaluation of measurement data – The role of measurement uncertainty in conformity assessment JCGM 106:2012
	Guide to the expression of uncertainty in measurement — Part 6: Developing and using measurement models JCGM GUM-6:2020

The following, corrected version of the 3rd edition cancels and replaces JCGM 200:2008 (see the JCGM 200:2008 Corrigendum) and the 2nd edition (1993). It can be downloaded as a PDF file or browsed online complete with annotations.

	International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (VIM 3rd edition) JCGM 200:2012 (JCGM 200:2008 with minor corrections)
	See also: VIM Definitions with Informative Annotations (html format) (last updated 29 April 2017) The annotations are developed exclusively by JCGM-WG2.

The VIM, published by the JCGM in English and French, has been translated into a number of other languages, including:

Arabic, Catalan, Croatian, Czech, German, Hungarian, Italian, Japanese, Portuguese (Portugal and Brazil), Romanian, Russian, Serbian, Spanish (Spain and Peru), Thai, Turkish, and Ukrainian.

For more information, please contact your NMI.