Software Usability Essay.

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Details:Assignment Overview First, you should read the key documents relating to the definition and expression of usability. As you read, try to define for yourself as specifically as possible how you would assess usability. Remember, usability matters, because time matters—the argument for usability is heavily based on efficiency, not on aesthetics or people\’s rights not to be put upon. User Interface Design and Usability (2009), retrieved from http://www.isii.com/ui_design.html The Independent. (2011, March 22). Website redesign: A design for strife. Retrieved from http://www.independent.co.uk/life-style/gadgets-and-tech/features/website-redesign-a-design-for-strife-2248852.html Krueger, M. (2011, August 12). Jakob Nielsen on usability for mobile sites and apps. Clickz. Retrieved from http://www.clickz.com/clickz/column/2099266/jakob-nielsen-usability-mobile-sites-apps Nielsen, J. (2011). Defer secondary content when writing for mobile users. Useit.com. Retrieved from http://www.useit.com/alertbox/mobile-content.html Usability First. (2011). What is usability? Here are few starting points. Retrieved from http://www.usabilityfirst.com/ Assignment Expectations After reading the courses materials, discuss the following questions. What do you believe are the appropriate criteria for assessing usability? Who should make such judgments? How should disagreements about usability be resolved?

 

 

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Usability of software may be described as the measure of interface quality which refers to the efficiency, effectiveness, and user satisfaction with its performance in given tasks. Evaluating software usability has become an essential element of the process of system development, and various methods have been developed to carry out evaluation.

The Concept of Usability

 

Over time, the concept of software usability has been described in various ways. Some of the most renowned descriptions have been based on semantics, features, and operations. In terms of semantics, usability has been matched with terms like ‘user friendliness’ or ‘ease of use’ without a formal definition of the properties of the software. As regards features, usability has been equated to either presence or absence of certain elements in the user interface like icons, windows, pointing devices, or menus. Operations points to the performance and effective levels as manifest by users for particular environmental scenarios and tasks. The definition based on semantics has been regarded as useless by designers since it presents neither a perspective for evaluators or useful guidance to designers. The feature-based construct is founded on an assumption that usability is the essence of an application which is false since users vary between environments. Therefore, the operational definition has been the most applied by professionals (usabilityfirst.com, 2011).

Criteria for Evaluating Usability

 

            There are various methods of assessing software usability. The methods depend on available resources, ability and preference, evaluator experience, and the stage of development of the tools being reviewed. In this regard, there are user-based method, expert-based method, and model-based method.

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