On quantity, value, unit, and other terms in the JCGM International Vocabulary of Metrology

The Joint Committee for Guides in Metrology (JCGM) is in the process of revising the third edition of the International Vocabulary of Metrology (VIM3). Open discussion of the concepts, terms, and definitions used in metrology by the international community in peer reviewed journals could be constructive inputs to the JCGM deliberations on revising the VIM3. The VIM3 definitions of quantity, quantity value, unit of measurement, measurement standard, measurement, uncertainty in measurement, true quantity value, coverage interval, coverage probability, and metrology are reviewed. Some defects are observed. Proposals are offered to stimulate discussions which may lead to better concepts, terms, and definitions for metrology.