The organizational structure of the CIPM MRA is indicated in Figure 1 and the scheme for key comparisons is shown in Figure 2. Each of these figures is for illustrative purpose only; the text of the CIPM MRA and the policy document Measurement comparisons in the CIPM MRA should be consulted for full details.
The regional metrology organizations (RMOs) play an important role in the CIPM MRA. They have responsibility for carrying out key comparisons within their regions, they carry out supplementary comparisons and other actions to support mutual confidence in the validity of calibration and measurement certificates of their member NMIs and are responsible for coordinating, through the JCRB, the entries into Appendix C of the MRA of the calibration and measurement capabilities of their member NMIs.
Figure 1. An outline of the organization of the CIPM MRA.
Figure 2. The scheme for key comparisons.