
Metrology is the study of Measurements. It starts a common understanding of units for human uses. Modern metrology goes back to the French Revolution's need to replace the old units with natural new ones, this led to the creation of the metric system. As the metric system was adopted by other countries, a new foundation was made called Bureau International des Poids et Mesures (BIPM). This foundation evolved into the International System of Units (SI) from a resolution that was made.
There are 3 basic activities of Metrology, these are:
These activities overlap, making the 3 sub-fields of Metrology:
... any application of metrology may fall under the scope of legal metrology if regulations are applicable to all measuring methods and instruments, and in particular if quality control is supervised by the state.