Quantitative Indexes to Evaluate Operator’s Bearing, Difficulty in Task, and Machine Operability when Remotely Controlling Backhoe

This paper presents quantitative indexes to evaluate operator’s bearing, difficulty in a task, and machine operability when an operator remotely controls a backhoe, and reports the use cases. The quantitative indexes would give her/him the opportunity to reflect on her/his works, and enable us to gain in-depth insight into the teleoperation, and furthermore give us with promising hints to improve it.