What Is Usability?
2010; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-12-375114-0.00004-9
Autores Tópico(s)Quality Function Deployment in Product Design
ResumoThis chapter discusses the multidimensional nature of usability. Usability has multiple components and is traditionally associated with five main usability attributes, namely, learnability, efficiency, memorability, errors, and subjective satisfaction. Only by defining the abstract concept of “usability” in terms of these more precise and measurable components one can arrive at engineering discipline where usability is not just argued about but is systematically approached, improved, and evaluated or possibly measured. Usability measurement starts with the definition of a representative set of test tasks, relative to which the different usability attributes can be measured. To determine a system's overall usability on the basis of a set of usability measures, one normally takes the mean value of each of the attributes that have been measured and checks whether these means are better than some previously specified minimum. Because users are known to be very different, it is probably better to consider the entire distribution of usability measures and not just the mean value.
Referência(s)