# Evaluator

A person who judges the design in a heuristic evaluation.

**Source:** “three to five people should independently evaluate” [How to Conduct a Heuristic Evaluation (Nielsen Norman Group)](https://www.nngroup.com/articles/how-to-conduct-a-heuristic-evaluation/)

See also: [Heuristic](/reference/glossary/heuristic), [Heuristic evaluation](/reference/glossary/heuristic-evaluation).

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Published 2026-10-29. Web page: https://www.mackenziebowes.com/reference/glossary/evaluator