requirement

https://doi.org/10.1351/goldbook.08122
Need or expectation that is stated, generally implied or obligatory.
Notes:
  1. "Generally implied" means that it is custom or common practice for the organization and interested parties that the need or expectation under consideration is implied.
  2. A specified requirement is one that is stated, for example, in documented information.
Source:
PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1039 (https://doi.org/10.1515/pac-2019-0819)