Limited human attention resources produce cognitive load and so critical human error. In particular, the case of large-scale systems due to human error from the limited attention resources had often very large accidental damage. Recent disaster of Fukushima Daiichi nuclear power plant is a typical example. Display design method to reduce the cognitive load has been studied in the area of Ecological Interface Design (EID). EID method proposed Work Domain Analysis (WDA) for understanding work domain constraints. Using WDA method, it analyzed Steam Generator and Pressurizer Water Level control process design of digitalized Main Control Room.

Since the computer technology has been drastically developed and broadly employed for the design of human machine system, human system interface was somehow digitalized. Actually the operator’'s working environment employing the digital devices are not be

In large scale complex system such as a nuclear power plant, it is important to select guidelines and/or checklist to evaluate the system performance, especially human performance for visual information while the number of evaluation items of the guidelin