a technique used to evaluate a product by testing it on users. This can be seen as an irreplaceable usability practice, since it gives direct input on how real users use the system.

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Show contextual FAQ's prior to contacting support?

Does providing contextual FAQ's prior to allowing users to contact a support specialist increase ROI? Each message or contact that a company receives costs that company. Is there any data that shows ...
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What are the differences between Usability Attributes and Usability Requirements

I want clarification on the above subject matter. Many authors refer to the two constructs as same. I will also like to to have full discussion on them and other external sources for further details. ...
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What are the metrics for measuring security and cognitive load as attributes of usability?

I want to know the standard metric one can use to measure security and cognitive load as attributes of usability in Mobile E-Commerce site application. The explanation should be base on users' ...