Evaluate the Existing Website Using the Usability Evaluation Criteria
As described in earlier chapters, the terms usability, UX, and interaction are confused; given that the field is still evolving, this is not a surprise.
Efficiency of use: How fast an experienced user can accomplish tasks. Memorability: after visiting the site, if a user can remember enough to use it effectively in future visits. Error frequency and severity: how often users make errors while using the system, how serious the errors are, and how users recover from the errors. Subjective satisfaction: If the user likes using the system.
We believe the easiest way to reduce criterion deficiency is through the use of several measures in the actual criterion, each focusing on a different characteristic of the UEM. In addition, it may be possible to examine how multiple measures can be combined into a composite measure that has a stronger relationship to the ultimate criteria
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