– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Text of the CIPM MRA

7: Confidence in measurements

7.1

Confidence in measurements is an essential prerequisite to international trade and facilitates almost every task in the industrialized world. To a large extent this confidence already exists and is based on the SI, which is the cornerstone of the international measurement system, as realized by the national metrology institutes. The function of this mutual recognition arrangement is to extend and consolidate pre-existing worldwide confidence in measurements.

7.2

Institutes participating in this arrangement are expected to extend existing international confidence in their activities by publishing regular reports on the work of their laboratories and transmitting them to the BIPM, by participation in relevant conferences, and by taking part in the activities organized by the BIPM.

7.3

In addition to participation in the key and supplementary comparisons, identified in paragraph 6, recognition of calibration and measurement certificates requires one of the following procedures in order to establish the necessary mutual confidence:

  1. an NMI that chooses for its calibration and measurement services a quality system that meets the requirements of ISO Guide 25 or equivalent for an NMI, assessed by an accreditation body fulfilling the requirements of ISO Guide 58, declares its calibration measurement capabilities (see paragraph T.7) and submits them to the local RMO for review and transmission to the Joint Committee for analysis and inclusion in Appendix C;

  2. an NMI that chooses to use a different way of assuring quality or chooses a different quality system, or ISO Guide 25 without third-party assessment, for its calibration and measurement services declares its calibration measurement capabilities (see paragraph T.7) and submits them to the local RMO for review and transmission to the Joint Committee for analysis and inclusion in Appendix C.
Demonstration of competence and capability may require visits and examination of procedures by an NMI and/or by peers selected by the local RMO.

7.4

Nothing in this arrangement is intended to limit the freedom of one or more signatories to establish mutual recognition, as specified in paragraphs 2.1 and 2.2, outside this arrangement.

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See also: JCRB