Urgent situation

・ Consider conveying information beyond human information loading

・ Design the important information simply in order to be noticed at a glance

・ Minimize errors

・ Use the suitable auxiliary equipment

Education situation

・ Minimize the learning time by designing it with social norms in mind

・ Design optimally to the user’s use-environment

Iterative operation

・ Improve the user’s convenience

・ Improve the user’s mental satisfaction

・ Improve the efficiency of conveying information

・ Minimize operational errors