– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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International Laboratory Accreditation Cooperation (ILAC)

The International Laboratory Accreditation Cooperation (ILAC) is an international cooperation between the various laboratory accreditation schemes operated throughout the world. ILAC first started as a conference in 1977 with the aim of developing international cooperation for facilitating trade by promotion of the acceptance of accredited test and calibration results.

Recognizing the need to strengthen the links between accreditation and metrology and to cooperate and to coordinate the actions of the BIPM and ILAC in respect of their tasks related to national and international measurement infrastructure, the CIPM and ILAC signed a Memorandum of Understanding (MoU) on 3 November 2001. This MoU was reaffirmed in 2012 and again in 2016.


Formal relationship:
Links between the BIPM and the ILAC:

A Joint CIPM/ILAC Working Group consisting of BIPM and ILAC members was established in view of the BIPM-ILAC MoU. The group has produced a joint statement on the collaboration and roles of the two organizations.

In particular the two organizations collaborate through:

  • Interaction at senior level through annual bilateral and multilateral meetings at the BIPM;
  • Mutual observer/liaison status at meetings;
  • Participation in the DCMAS Network;
  • Participation in the JCGM;
  • ILAC is a major partner in the JCTLM;
  • The BIPM is an active participant in the ILAC Accreditation Committee (ILAC AIC) and particularly the AIC WG2;
  • The BIPM organizes consultation with NMIs (via RMOs) on key ILAC documents;
  • The BIPM and ILAC issue joint declarations and joint statements when appropriate:

Joint statements:
  • 2012:
  • Joint ILAC-CIPM communication regarding the accreditation of calibration and measurement services of national metrology institutes
  • 2011:
  • BIPM, OIML, ILAC and ISO: Joint declaration on metrological traceability
  • 2007
  • Definition of CMCs
  • 2006:
  • BIPM, OIML, ILAC: Common statement and declaration on the relevance of various international agreements on metrology to trade, legislation and standardization
  • 2005:
  • Joint statement by the CIPM and ILAC on improving world-wide traceability and acceptance of measurements carried out within the CIPM MRA and the ILAC arrangement

    BIPM contact(s):
    ILAC contact(s):
    • Ms Merih Malmqvist Nilsso, ILAC Chair
    • Mr Erik Oehlenschlaeger, AIC Chair and AIC WG2 Convener

    Organization: