- This article is about the science of measurement. For the
study of weather see Meteorology. Metrology is the science of
measurement. Metrology includes all theoretical and practical
aspects of measurement. The word comes from Greek μέτρον
(metron), "measure"1 + "λόγος" (logos), amongst others meaning
"speech, oration, discourse, quote, study, calculation,
reason".2 In Ancient Greek the term μετρολογία (metrologia)
meant "theory of ratios".3 Metrology is defined by the
International Bureau of Weights and Measures (BIPM) as "the
science of measurement, embracing both experimental and
theoretical determinations at any level of uncertainty in any
field of science and technology."4 The ontology and
international vocabulary of metrology (VIM) is maintained by the
Joint Committee for Guides in Metrology (JCGM), a group made up
of eight international organisations – BIPM, IEC, IFCC, ISO ,
IUPAC , IUPAP, OIML and ILAC.5 - Definiting of internationally
accepted unit of measurement. - Realisation of these units of
mea