How does one measure Usability? In human-computer interaction, the clarity with which an end-user interacts with a computer application (typically a web site) denotes its usability. The end-user is usually a lay-person who is not associated with the development or administration of the application. Expert knowledge should, ideally, not be a pre-requisite for successfully using any application. Human intuition should suffice.

There are many tests and protocols that purport to measure Usability. Many of them are subjective. Sometimes the most effective method is to gauge a user’s understanding of the application after one sitting, lasting approximately 10 to 20 minutes.

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