Over the years the use of on-line portal systems has increased tremendously among educational institutions. However, a portal that is not easy to use is more likely to drive users away than attract them. If such a portal is the gate to some commercial products, it can become a stumbling block to the success of the business it is meant to promote. This book stresses the need to design and implement effective portal systems that recognize the central role of usability. The book presents a practical model for conducting evaluation of portal systems using a case study approach. Two on-line portal...