Mobile commerce (m-Commerce), which allows for anytime/anywhere access to information and services, shows great potential. Ubiquitous access to information systems is critical to enable such activities. However, as with most systems, usability is critical to the success of mobile applications. This paper presents a new theoretical usability model that takes into account the unique characteristics of ubiquitous mobile systems. By presenting the various types and limitations of the mobile user, environment, task and interface, this model helps further our understanding of the unique usability aspects of this emerging field. Various mobile interface options are then evaluated within the context of the proposed model. Conclusions are drawn and areas for potential future research are provided.
Khaled Hassanein, Milena M. Head