BIPM - GUM

Joint Committee for Guides in Metrology
(JCGM)

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 three 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
	Evaluation of measurement data – Concepts and basic principles

The following documents are at an early stage of preparation:

	Evaluation of measurement data – Supplement 3 to the "Guide to the expression of uncertainty in measurement" – Modelling
	Evaluation of measurement data – Applications of the least-squares method

Software for Measurement Uncertainty Evaluation
This software has been developed to promote and support the use of the GUM and its supporting documents. It was written to provide the results presented in tables and figures contained within GUM Supplements 1 and 2. It can be used to help users learn about the methods for uncertainty evaluation described in the GUM and GUM Supplements 1 and 2, and to make their own implementations of these methods. No recommendation is made by JCGM regarding this or any other software for measurement uncertainty evaluation.