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Concept
Heuristic evaluation
Summary
A heuristic evaluation is a usability inspection method for computer software that helps to identify usability problems in the user interface design. It specifically involves evaluators examining the interface and judging its compliance with recognized usability principles (the "heuristics"). These evaluation methods are now widely taught and practiced in the new media sector, where user interfaces are often designed in a short space of time on a budget that may restrict the amount of money available to provide for other types of interface testing.
The main goal of heuristic evaluations is to identify any problems associated with the design of user interfaces. Usability consultants Rolf Molich and Jakob Nielsen developed this method on the basis of several years of experience in teaching and consulting about usability engineering. Heuristic evaluations are one of the most informal methods of usability inspection in the field of human–computer interaction. There are many sets of usability design heuristics; they are not mutually exclusive and cover many of the same aspects of user interface design. Quite often, usability problems that are discovered are categorized—often on a numeric scale—according to their estimated impact on user performance or acceptance. Often the heuristic evaluation is conducted in the context of use cases (typical user tasks), to provide feedback to the developers on the extent to which the interface is likely to be compatible with the intended users' needs and preferences.
The simplicity of heuristic evaluation is beneficial at the early stages of design and prior to user-based testing. This usability inspection method does not rely on users which can be burdensome due to the need for recruiting, scheduling issues, a place to perform the evaluation, and a payment for participant time. In the original report published, Nielsen stated that four experiments showed that individual evaluators were "mostly quite bad" at doing heuristic evaluations and suggested multiple evaluators were needed, with the results aggregated, to produce and to complete an acceptable review.
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