In this paper, we first point out the limitation of the existing methods in usability evaluation, and propose a new method to find tasks and users that can cause problems in the use of software applications. To deal with object-based applications, we define unit actions and divide a given task into the sequence of unit actions. Then, we propose a new measure to calculate the degree of lostness for the unit actions. In several experiments, we show the proposed method can represent the usability well while the previous method has a problem in object-based applications. We also find that the user’s evaluation is more related to the proposed method than the previous method based on execution time through correlation analysis.

1. 서 론
 2. 사용성 평가 방법
  2.1 시간 측정 연구
  2.3. 자동화 분석 연구
  2.4. 행동 측정 연구
 3. 단위 행동 기반의 손실률
  3.1 단위 행동
 4. 실험 및 결과
  4.1 실험 환경
  4.2 기존 손실률 방법의 문제점 검증
  4.3 시간 측정 연구와 제안한 방법의 비교
  4.4 상관 계수의 유의성 검증
 5. 결 론
 References

• 박희성(Control and Instrumentation Engineering, Kwangwoon University) | Hee Sung Park
• 박광현(School of Robotics, Kwangwoon University, Wolgye-Dong, Nowon-Gu, Seoul, Korea) | Kwang-Hyun Park Corresponding author