Comparability of examination results, for nominal properties of a given kind-of-nominal-property, that are examined and traceable to the same reference.
Example: Examination results for the colours of two different biological fluids are comparable when they are both traceable to the same colour chart.
Source:
PAC, 2018, 90, 913. 'Vocabulary on nominal property, examination, and related concepts for clinical laboratory sciences (IFCC-IUPAC Recommendations 2017)' on page 928 (https://doi.org/10.1515/pac-2011-0613)