A Novel Method for Acquiring Engineering-Oriented Operational Empirical Knowledge

Table 2

MODAPTS representation of operator’s welding process fragment.

Number	Motion of left hand		Motion of right hand
	Discomposed motion description	MOD representation	Discomposed motion description	MOD representation
1	Grasp the pipe	M4G1
2	Insert the pipe and adjust its position	M4P2	Prepare the welding gun	M3P2
3	Hold the pipe	H	Start spot welding	M1P0 ×