Analysis of the human risk factor which affects the reliability and safety of machinery

Abstract

It is an important matter to decrease the mean time to repair (MTTR) in order to improve the reliability of machinery. When the factory workers repair as non routine operations, there is no operation manual. Therefore, the repairing quality depends on the maintenance engineer’s skill or the operator’s skill. However, in the non-routine operations, the correlation of the maintenance engineer’s experience and the decrease of MTTR does not necessarily exist. This is an important problem in optimum maintenance planning. So, an analysis of the influence of the human factor on the reliability of machinery is desired. In this research, we make an action model for coping with the failures of maintenance engineers, and analyze the human factor which affects the reliability of machinery. In addition, we consider the improvement of the reliability of machinery by reducing the MTTR.