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The usability of an application often plays an important role in determining its success. Accordingly, organizations that develop software have realized the need to integrate usability engineering into their development lifecycles. Although usability practitioners have successfully applied usability engineering processes to increase the usability of user-interaction designs, the literature suggests that usability practitioners experience a number of difficulties that negatively impact their effectiveness. These difficulties include identifying and recording critical usability data, understanding and relating usability data, and communicating usability information. These difficulties are particularly pronounced for novice usability practitioners. v Table of Contents 1 Introduction.

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