To improve safety morale, drivers, conductors and other field workers practice regular small-group safety activities e.g. safety meetings. However, many field organizations have problems of mannerism of planning and management or low participation rate in such meetings. So the problems of practicing safety meetings are revealed by participating in planning and management of those meetings at field organizations together with workers there, and repeating observations and investigations. These included biased agenda and participants who do not regard points of discussion as their own problems. These problems could not be extracted from questionnaires survey (Fig. 1).

To solve these problems, a discussion technique for analyzing cause of supposed accident in safety meetings is prepared. By implementing the cognition interview method developed to acquire many witness evidences, the technique gives workers an image of their workplace or has them assume the worst scenario and result of an accident. Workers will then regard a subject of safety meeting as a problem of their own. It allows discussion to have multi-aspects by introducing methods as below; the hints and reasons analysis method that involves presenting hints one by one of problems of working procedures and tools, measures proposal of two directions such as managed measures and voluntary, and reviewing countermeasures (Fig. 2). A manual of discussing on accident analysis is also prepared to show how to proceed this technique and its notice.