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There is a continuing need for quality eCommerce websites which satisfy their owner’s perspective of quality of design and visitor’s perspective of quality of use. More particularly there is a need for website owners to be able to specify what constitutes a website that will fully engage site visitors and consequently what needs to be designed into the website in order to insure return on investment. This paper argues that the term usability is inappropriate to quality websites and that website engagibility is a step beyond usability. The paper reports continuing research which seeks to identify the requirements of website engagibility, and to provide a mathematical solution for measuring and comparing website performance. The research relies on the Software Quality Star to provide an end-to-end conceptual model for studying website quality. In particular it focuses on the potential of a website’s design to support the engagibility of visitors. Using a comprehensive set of Quality-of-product criteria and counts for a set of eCommerce websites the paper explains how a ratio value can be calculated for a website. These metrics specifically avoid reliance on website traffic data and visitor statistics and the study concerns itself with website structure and design criteria. The approach is influenced by assessment and predictive measurement theory. Then, using Metric Ratio Analysis the paper shows how website engagibility performance ratings can be determined.
Fitzpatrick, Ronan and Smith, Peter and O'Shea, Brendan: Website engagibility: a step beyond usability. Proceedings of a parallel session "Quality models for Human Computer Interaction" in the context of the 3rd. International Conference on Universal Access in Human-Computer Interaction, HCI International 2005, Las Vegas, United States of America. Published by Lawrence Erlbaum.