Research on Method of Human Error Analysis Using 4M4E

This article describes 4M4E analysis, a method of multifaceted analysis of contributing factors that induce human error. The article is part of a special issue of JR EAST Technical Review that focuses on technical innovations for commuter trains. The analysis includes a three-faceted approach: time series analysis, structural analysis, and detailed analysis by problem groups. The authors note that the procedures for 4M4E analysis described in the article have been compiled in the forma of a manual and, starting in 2004, education on 4M4E is being provided at each branch of JR East. In addition, in order to improve the level of the staff conducting the analyses and to enhance the precision of the content of the analysis, training and support tools for 4M4E are currently being developed. The overall intention of this program is prevent accidents and the recurrence of accidents.