Account services

Your password

We will force a renewal of passwords in the coming weeks (More...)


What is usability?


Usability is the measure of the quality of a user's experience when interacting with a product or system — whether a Web site, a software application, mobile technology, or any user-operated device.

Usability is a combination of factors that affect the user's experience with the product or system, including:

Ease of learning

How fast can a user who has never seen the user interface before learn it sufficiently well to accomplish basic tasks?

Efficiency of use

Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?

Memorability If a user has used the system before, can he or she remember enough to use it effectively the next time or does the user have to start over again learning everything?
Error frequency and severity How often do users make errors while using the system, how serious are these errors, and how do users recover from these errors?
Subjective satisfaction How much does the user like using the system?