permissible
allowed / acceptable / tolerable
Adjective
This term carries a clinical or formal tone, often appearing in legal documents, technical manuals, or official regulations. It suggests a boundary that has been formally established, where crossing that line results in a violation of a rule or a failure of a technical specification. In technical contexts, it describes a threshold of tolerance. While a value might be imperfect, it is deemed permissible if it falls within the predefined range of acceptable deviation, distinguishing it from something that is ideal or optimal.