抄録
Residual life assessment system of cranes with risk-based maintenance technique has been generated. Risk is defined as a multiplication of likelihood by consequence of a failure with semi-qualitative method. This is based on engineering judgment with inspection data and operating conditions and fatigue damage assessment and so on. Ranking of likelihood and consequence could be defined with the assessment of damage function and others. Risk-based maintenance technique is expected as a new technique to optimize the inspection and maintenance plan.
