Usability is Quality of Use
نویسنده
چکیده
In a paper at HCI International 1991, Bevan et al (1991) asked “What is usability?”, and distinguished between broad and narrow approaches to usability. This paper builds on that distinction, identifying the broad approach to usability with the higher level quality objective of “quality of use” (Bevan, 1995a). Quality of use should be the major design objective for an interactive product: does the product enable the intended users to achieve the intended tasks? This relates usability to business objectives and elevates usability from an optional extra to the prime design goal. The narrow approach is complementary and is concerned with the design of features of the product which are a pre-requisite for quality of use. The two different interpretations of usability lead to two approaches to the specification and evaluation of usability.
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