– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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CCQM Working Group on Key Comparisons and CMC Quality (CCQM-KCWG)

Chair:  Dr Della Wai Mei Sin (GLHK)


    Within the CCQM, the KCWG is responsible for:
    • overseeing the review of CMCs,
    • defining specific technical review criteria,
    • coordinating the inter-regional review process,
    • providing guidance on the range of CMCs supported by specific comparisons,
    • identifying where comparisons are needed, and
    • coordinating the review of existing CMCs in the context of new information.


  • Dr Della Wai Mei Sin  (GLHK)


  • Dr Angelique Botha  (NMISA)


  • Dr Toshiaki Asakai (NMIJ/AIST)
  • Dr Angelique Botha (NMISA)
  • Ms Jennifer Carney (NIST)
  • Dr Valnei Smarçaro Da Cunha (INMETRO)
  • Dr Carla Divieto (INRIM)
  • Dr Lianhua Dong (NIM)
  • Mrs Olga Efremova (VNIIM)
  • Dr Bruno Garrido (INMETRO)
  • Dr Heidi Goenaga Infante (LGC)
  • Dr Kazumi Inagaki (NMIJ/AIST)
  • Dr Byung Joo Kim (KRISS)
  • Dr Yuriy Anatolievitch Kustikov (VNIIM)
  • Dr Béatrice Lalere (LNE)
  • Prof. Hongmei Li (NIM)
  • Ms Maré Linsky (NMISA)
  • Dr Liandi Ma (NIM)
  • Dr Stéphanie Maniguet (BIPM)
  • Prof. Zoltan Mester (NRC)
  • Dr John Molloy (NIST)
  • Dr Bernhard Niederhauser (METAS)
  • Prof. Gavin O'Connor (PTB)
  • Dr Narine Oganyan (VNIIFTRI)
  • Dr Melina Pérez-Urquiza (CENAM)
  • Dr Matilda Rozikova (CMI)
  • Dr Alexander Shard (NPL)
  • Dr Takuya Shimosaka (NMIJ/AIST)
  • Dr Egor Sobina (UNIIM)
  • Dr Tang Lin Teo (HSA)
  • Dr Sophie Vaslin-Reimann (LNE)
  • Dr Robert I. Wielgosz (BIPM)

  CCQM: Upcoming meetings
23–30 April 2021: 26th meeting of the CCQM and related meetings
22–29 April 2022: 27th meeting of the CCQM and related meetings

CCQM summary
General information
CCQM members
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CCQM strategy
CCQM workshops
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Photographs of the CCQM
Summary of CCQM Key Comparisons and Pilot Studies
Traceability exceptions
Open documents
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EAWG documents
GAWG documents
IAWG documents
IRWG documents
KCWG documents
OAWG documents
PAWG documents
SPWG documents