Usability is about: Effectiveness, ease of learning,efficiency of use,Memorability,error prevention,satisfaction.
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Effectiveness – Can users achieve what they need by using the product?
Ease of learning – How fast can user who has never seen the interface learn to use it?
Efficiency of use – How fast can users complete the tasks?
Memorability – Can users remember enough to reuse the interface effectively?
Error Prevention – The best way to deal with errors is to design the interface so users do not make errors.
Satisfaction – How much does the users like using the system?
Usability: WHY So User Centered?
You can’t control the person, but you can design the environment to change behavior
Means - "Behavior is a function of a Person and his Environment"
Don Norman – User Experience:
"User experience" encompasses all aspects of the end-user's interaction with the company, its services, and its products. The first requirement for an exemplary user experience is to meet the exact needs of the customer, without fuss or bother. Next comes simplicity and elegance that produce products that are a joy to own, a joy to use. True user experience goes far beyond giving customers what they say they want, or providing checklist features. In order to achieve high-quality user experience in a company's offerings there must be a seamless merging of the services of multiple disciplines, including engineering, marketing, graphical and industrial design, and interface design.
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