Several types of discount usability methods involve an evaluation of an information product by one or more experts, who inspect the product to identify and rate the severity of usability problems. Listed here are the most commonly used types of usability inspection methods:
- Heuristic Evaluation
See the page of resources on this topic maintained by the STC Usability and User Experience Community.
For the difference between heuristic evaluations and expert reviews, see this page at Usability.gov.
- Cognitive Walkthrough
Google Books allows a limited preview of Human Factors Methods: A Practical Guide for Engineering and Design by Neville Stanton, which includes a section describing the cognitive walkthrough method.