Facility diagnosis device and facility diagnosis method

A facility diagnosis method of an information processing system, wherein the information processing system includes:

• a robot having a plurality of arms, each arm having a motor driving the arm and a current sensor measuring a current of the motor;
• and a central processing unit (CPU) coupled to the robot via a network, the facility diagnosis method comprising:
• storing, by the CPU, information including an operation control method for preventing deterioration of the plurality of arms of the robot for each of a plurality of predetermined deterioration prevention modes;
• calculating a predetermined key performance indicator (KPI) by using a deterioration degree predicted for each of the plurality of predetermined deterioration prevention modes for the plurality of arms of the robot, and determining whether the predetermined KPI satisfies a predetermined condition;
• determining a deterioration prevention mode that should be executed from a satisfaction determination result;
• outputting to the robot control information according to the deterioration prevention mode that should be executed, the control information defining an operation load for each arm of the robot;
• and
• controlling, by the robot, the operation load of each arm based on the control information.