What is Usability Engineering?

Usability Is all about:

• Effectiveness
  (Can user achive what they need by using the product?)
• Ease of learning
  (How fast can a user who has never seen the interfact can learn to use it?)
• Efficency of use
  (How fast can a user compete his tasks?)
• Error Prevention
  (The best way to deal with errors is to design Interfact in such way that user do not make errors)
• Memorability
  (Can user remember enough to reuse the User Interface effectively?)
• Satisfaction
  (How much does the user like to using the system?)

“Usability” refers to the extent which a user can use the interface to achieve his specified goals with effectiveness, effeicency and satisfation.

Usability can be achived by Human centered design :
The active involovment of user and a clear understanding of user and task requirement.
An appropriate allocation of function between user and technology.

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