Advances in technology have continuously provided new flight capabilities. Along with these new capabilities have come new demands on the flight crew. Pilots are now seeing a greater percentage of flight tasks being performed by automatic systems; however, data handling and integration tasks have reached new heights that now require more pilot attention. The pilot's changing role creates a greater burden on the system design and evaluation process, which is used to ensure the man-machine interface operates at satisfactory levels. Discussed in this paper are various methods for evaluating this interface at the different levels of system design.