Working Group Members

CCTF Working Group on the CIPM MRA (CCTF-WGMRA)


Mr Chris Matthee

National Metrology Institute of South Africa

South Africa


Dr Gianna Panfilo

Bureau international des poids et mesures


cctf-wgmra members


  • Chairpersons of the RMO TCs for Time and Frequency
  • Experts from time laboratories

List of meetings

Meetings and related documents

Publications - TITLE


see more CIPM MRA docs


Terms of reference

The functions of the CCTF-WGMRA are:

  • to authorize on a provisional basis for any action needed between meetings of the CCTF as indicated by the CIPM MRA, in consultation with the CCTF President;
  • to perform coordination activities relating to the CIPM MRA between RMOs;
  • to act as point of contact for the BIPM and JCRB on CIPM MRA matters;
  • to report actions to the next CCTF meeting, the CCTF revising the decisions as required;
  • to identify areas where additional key comparisons and supplementary comparisons are needed, and develop the necessary guidelines and procedures;
  • to provide guidance on the range of CMCs supported by particular key and supplementary comparisons;
  • to establish and maintain a list of service categories, and where necessary rules for the preparation of CMC entries;
  • to agree on detailed technical review criteria;
  • to coordinate the review of existing CMCs in the context of new results of key and supplementary comparisons.

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