Abstract
I attempt to make a form to analyze problems of user operations. Users usually operate systems and tools based on their own user model (mental model). Designers need to know why users make mistakes and slips, but it is difficult to analyze causes of mistakes. D.A. Norman presented “Seven Stage of Action” and Rasmussen prescnted “3 revel of Human Action Control”, these models are very useful for predicting user action. In this research I combined 2 models, made a new form and applied it to analyze usability test results of 5 students groups. From the inspection the proposed form seems useful for analysis of users mistakes and slips.
