The prioritization of usability problems has been frequently overlooked by researchers in the field of Human-Computer Interaction. The prioritization, however, is becoming an important issue because the usability problems are getting more complicated under severely constrained time and cost.
This thesis concentrates on devising a systematic method for prioritizing usability problems, that will help designers identify and rectify more critical defects in user interfaces in an effective way.
The analysis of the design space is conducted at three different levels; task, operation, and physical levels, to systematically assign proper priorities to usability problems. The analysis reduces the design space to be considered to save the designer’s effort. To validate the proposed method, a case study was conducted, the results of which show the utility of the proposed design space analysis
