Abstract

Usability is considered as one of the most important quality attributes, being a fundamental aspect in all software products. It is even more crucial in those systems that are designed for a wide variety of users, called by different authors as inclusive products. It can be observed that the traditional requirements elicitation process does not consider the special needs of people with disabilities. Not even in the proposals of inclusive systems are special techniques included. In this context, the present article seeks to provide a broad perspective on different factors influencing usability identified in several investigations focused on software products for users with sensory disability. A comparative chart is presented showing the strengths and weaknesses of several models, guides and frameworks designed to satisfy the needs of this group of users. Finally, several metrics of usability requirements are proposed, quantifying the process of requirements capture by means of usability factors in inclusive systems.