property value assignment 

Synonym: value assignment
https://doi.org/10.1351/goldbook.08038
Determination of property values obtained in the course of the production of a reference material.
See also: assigned value
Source:
PAC, 2021, 93, 997. (Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)) on page 1014 [Terms] [Paper]