| Abstract |
| Because of the development of digital technologies and information-oriented products, the importance of user interface design and usability are increasing in recent year. So we need a systematic and rational way to measure and manage how effective the improvement of user interface is. The purpose of this study is to develop measurable ``Usability Improvement Index`` which signify how much usability has improved in user interface design. First, I made the framework of measuring and evaluating usability through analysis of existing usability metrics and previous studies. Then, I suggested the process of calculating ``Usability Improvement Index`` based on categorizing characteristics of measurable usability and definition of usability metrics. The process is as in the following: measuring the present level of usability, analysis of problems, making alternative user interface design, measuring the improved level of usability, calculating Usability Improvement Index. For verification, the case study on application of Usability Improvement Index to usability improvement of application software of digital camcorder presented. This study is expected to assist ``goal oriented user interface design`` and to manage usability systematically. |
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| Key Words |
| 사용자 인터페이스 디자인, 사용성, 사용성 평가, 사용성 개선지수, User Interface Design, Usability, Usability Evaluation, Usability Improvement Index |
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