How usable is a website? Ask these questions
How efficient is it to use?
- Does it take less time to accomplish a particular task?
- Is it free from catastrophic errors?
How easy is it to use?
- Can you learn to use it by observing?
How satisfying is it to use?
- What is the quality of your experience as a user?
Usability Engineering means designing a web site to be user centred (rather than technology centred), and involving users in the design process.
Usability Testing means measuring the usability of a web site (or product).
Usability Consultant is someone who assesses the usability of a web site.