proficiency testing round 

Synonym: PT round
https://doi.org/10.1351/goldbook.08103
Single complete sequence from distribution of proficiency test items to reporting of the evaluation results to the participants.
Source:
PAC, 2021, 93, 997. (Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)) on page 1034 [Terms] [Paper]