I nternational
System of
Units
(SI Unit)

General Conference of Weights & Measures
International Committee of Weights &
Measures
International Bureau of Weights & Measures

National
Measurement
Standards

Multilateral comparison via regional
Metrology network APMP and cooperation
with other national measurement institutes,
e.g. NIST, PTB, NPL, CSIRO.

Industrial
Measurement
Standards

End
Users