Abstract
In this study, first, we tried to identify the direct and indirect causes of an accident by directly asking those who had accidents about how accidents occurred. Additional field surveys were done on multi-layered subcontracting systems, sharings between a contractor and a subcontractor of cost, role, and resposibility with respect to safety management, and the flow of instruction and information on safety management. Based on results of these surveys, discussions were made on the relationship between the safety management system and labor accidents.
