– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Joint statement by the CIPM and ILAC on the roles and responsibilities of national metrology institutes and national recognized accreditation bodies

Improving world-wide traceability and acceptance of measurements carried out within the CIPM MRA and the ILAC arrangement PDF file Metre Convention logo   ILAC

Measurements have always been essential in supporting international trade and regulation. They are required for the underpinning of conformity with written standards, and measurements have also stimulated innovation and advances in technology as well as in human well-being.

Many millions of measurements are made each day. Ideally, all should be traceable to national reference standards so as to ensure international consistency and long-term stability. This was originally the task of national metrology institutes (NMIs), or their historical equivalents. In 1875, the need for international consistency in measurements was recognized and formalized by the Metre Convention.

During the 1960s the NMIs recognized the importance of creating a system through which they might assess and validate the technical competence of other organizations which need to make, and demonstrate traceable measurements. This led to the emergence of the accredited laboratory sector, and to the International Laboratory Accreditation Cooperation (ILAC).

Signed on behalf of Professor Ernst O. Göbel, President of the CIPM, and Mr Daniel Pierre, Chair of ILAC, we have pleasure in drawing your attention to this joint statement on the respective roles and responsibilities of the two communities, metrology laboratories and accreditation bodies.

The document is relevant to national and international bodies which involve, or which rely on, the traceability and world-wide acceptance of measurements for their implementation. It is also relevant to the organizational structures of measurement-related bodies at the national, regional and international levels.

We invite you to note the joint statement and distribute and promote it to your constituencies.

Andrew J. Wallard
Alan Squirrell
then Director, BIPM
Secretary, ILAC

CIPM MRA docs.
Policy documents
Guidance on CMCs
Guidance on comparisons
Complementary info.
Use of the CIPM MRA logo
See also: JCRB
KCDB leaflet
Approval process
Historical development of the CIPM MRA
Organizational structure of the CIPM MRA
The essential points of the CIPM MRA
Potential economic impact of the CIPM MRA
Reports on the KCDB

Official and explanatory texts