A Quantitative Evaluation for Usability under Software Quality Models

Abstract

Usability evaluation in Human-Computer Interaction (HCI) is done by observing the user's behaviors and reactions while performing a given task. The observers examine users' behaviors while doing assigned tasks and describe their observations in terms of usability. The usability evaluation would depend on the observers' ability or experience. It proceeds qualitatively. We propose a quantitative evaluation, which adopts attributes and metrics from System and Software Quality Requirement and Evaluation(SQuaRE) published by International Standard Organization (ISO). Furthermore, we examine qualitative observations conducted in usability testing and apply our method to make it a quantitative evaluation.