Summary: How to define usability? How, when, and where to
improve it? Why should you care? Overview defines key usabilty
concepts and answers basic questions. This is the article to
give to your boss or anyone else who doesn't have much time, but
needs to know the basic usability facts. What — Definition of
Usability Usability is a quality attribute that assesses how
easy user interfaces are to use. The word "usability" also
refers to methods for improving ease-of-use during the design
process. Usability is defined by 5 quality components: -
Learnability: How easy is it for users to accomplish basic tasks
the first time they encounter the design? - Efficiency: Once
users have learned the design, how quickly can they perform
tasks? - Memorability: When users return to the design after a
period of not using it, how easily can they reestablish
proficiency? - Errors: How many errors do users make, how severe
are these errors, and how easily can they recover from the
errors? - Satisfaction: How pleasant is it to u