Over almost twenty working years in the Italian Metrology Service, the authors have witnessed a generalized lack of awareness about the relationship between maximum permissible error (mpe) and uncertainty of the verification processes (the so-called Test-Uncertainty Ratio, TUR). This was also due, in the authors' opinion, to the fact that in the old metrological approach, every instrument was the object of particular legal provisions, which were made by the technical central metrology service that, in providing the local inspectors with the operating procedures, also listed, among other things, the "precision" requirements which the field standards had to fulfil as well as the verification conditions and procedures that had to assure the overall uncertainty requirements for the verification to be carried out in an adequate manner.
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