The proliferation of World Wide Web pages with poor usability is a serious problem because these pages waste user time, discourage exploration and could be responsible for a large amount of unnecessary traffic on the Internet. To alleviate this problem, we are proposing a set of simple guidelines for designing usable Web pages. The guidelines were compiled from a heuristic evaluation of existing Web sites. An experiment was conducted to evaluate the usability of home pages designed with the proposed guidelines. The experiment demonstrated that designers of Web pages can improve the usability of home pages by applying these guidelines.

The interaction style used in electronic patient record systems and its usability can have a significant impact on the acceptance, efficiency and satisfaction of its users. In this paper we describe a study of physician interaction with a text-based electronic patient record system and a graphical-based electronic patient record system. The usability attributes of learnability, efficiency and satisfaction are evaluated on typical tasks such as viewing a patient's record, documenting and ordering. The results of the study revealed that a graphical-based interface can significantly reduce the time it takes physicians to complete typical tasks in comparison with a text-based interface. The results of the study also revealed that physicians can get more satisfaction from interacting with a graphical-based electronic patient record system than with a text-based system.

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