The tasks of the JCGM are to maintain and promote the use of the Guide to the Expression of Uncertainty in Measurement (known as the GUM) and the International Vocabulary of Basic and General Terms in Metrology (known as the VIM). The JCGM has taken over responsibility for these two documents from ISO TAG 4, who originally published them under the auspices of the BIPM, IEC, IFCC, ISO, IUPAC, IUPAP and OIML. Click here for the JCGM Charter. The JCGM operates through two working groups: the JCGM-WG1, with responsibility for the GUM, and the JCGM-WG2, with responsiblity for the VIM.

	Chairman:	Prof. A.J. Wallard Bureau International des Poids et Mesures Pavillon de Breteuil F-92312 SÈVRES CEDEX France
	BIPM contact:	Dr C. Thomas Bureau International des Poids et Mesures Pavillon de Breteuil F-92312 SÈVRES CEDEX France
Member organizations:
	BIPM	Bureau International des Poids et Mesures
	IEC	International Electrotechnical Commission
	IFCC	International Federation for Clinical Chemistry and Laboratory Medicine
	ILAC	International Laboratory Accreditation Cooperation
	ISO	International Organization for Standardization
	IUPAC	International Union for Pure and Applied Chemistry
	IUPAP	International Union for Pure and Applied Physics
	OIML	International Organization of Legal Metrology