Visibility of steps for stair users is one of important factors which affect the rate of stair accident. In former paper,we reported experimental results about each effect of several important factors on the visibility . But,we could compare those effect data only within the same factor items. In this paper, we made an experiment to grasp effect data of different factor items, and analyzed the data by quantification of first method. Also, we analyzed the data in former paper by the same method. As the result, we became to be able to compare all effect data we grasped.
