– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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CCT Working Group for Key Comparisons (CCT-WG-KC)

Terms of reference

The terms of reference of WG-KC are to oversee all aspects ok key comparison documentation, starting with the protocol and ending with the Draft B Report and the KCDB entry, including provision of advice to pilots on the calculation of degrees of equivalence, key comparison reference values and linkage between RMO and CIPM key comparisons.


    examining all relevant document for each key comparison starting with the protocol and ending with the Draft B Report;
    advising the pilot laboratory in preparing the text of the entry to Appendix B of the CIPM MRA as required, and to approve the Draft B Report on behalf of the CCT for inclusion into the BIPM key comparison database (KCDB);
    advising the pilot laboratory about the preparation of a comparison status document;
    review and comment on supplementary comparison Draft B reports.


  • Dr Andrea Peruzzi  (VSL)


  • Dr Stephanie Bell (NPL)
  • Dr Robert Benyon (INTA)
  • Dr Rien Bosma (VSL)
  • Dr Helen McEvoy (NPL)
  • Dr Christopher Meyer (NIST)
  • Dr Steffen Rudtsch (PTB)
  • Dr Richard Rusby (NPL)
  • Dr Gregory F. Strouse (NIST)
  • Dr Andrew D. Todd (NRC)
  • Dr Rod White (MSL)
  • Mr Yoshiro Yamada (NMIJ/AIST)
  • Dr Inseok Yang (KRISS)
  • Mr Zundong Yuan (NIM)
  • RMO TC-T chairpersons are invited

  • BIPM contact : Dr S. Picard

  CCT: Upcoming meetings
23–24 March 2020: CCT Working and Task group meetings
24–25 March 2020: 29th meeting of the CCT

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