An Integrated Measurement Model for Evaluating Usability Attributes

In order to develop an easy to use, effective and efficient software system that satisfies the stakeholder needs, usability attributes should be addressed and measured appropriately during all development stages. However, measuring usability is widely recognized as the most challenging task for the system development team. Such a challenge can be attributed to the absence of an existing comprehensive usability model that covers all the fuzzy usability attributes. This paper aims to elicit and analyze usability attributes from previously existing usability models for developing an integrated usability model from different practitioners' and researchers' views. The main contribution of this model is constituted in the attempt of gathering and modeling several fuzzy usability attributes in a homogeneous manner, and providing different measures for these attributes, in order to facilitate measuring them during every stage of software development. Hence, this will assist in detecting and tracing usability problems in each stage, handling them with less time, efforts, resources, and in evaluating the usability of the implemented system as well.