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Usability is a quality attribute of the UI (Norman & Nielsen) "The extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use" (ISO 9241 -11)

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Human Computer Interaction

How do we design it? How do we build it? How do we evaluate what we have designed and built?   Early design approaches: Requirements/data gathering: –User analysis (know your user) – Task analysis – Environment/domain Analysis – Data collection Methods: e.g....

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