Table 5.

Effect values of potential factors on drilling task performance.

Independent variable	Dependent variable	Intermediate variable	Direct effect	Indirect effect	Total effect	Potential factors	Impact of potential factors on Performance
Human	Task performance		0.27		0.27	Safety responsibility awareness	0.1647
						Construction experience	0.1971
						Personnel organization efficiency	0.2484
Tool	Task performance	Human	0.39	0.09	0.48	Availability of spare tools	0.3072
						Convenient maintenance	0.3696
						Man–tool matching	0.2256
						Safety performance	0.3024
Environment	Task performance	Human	0.32	0.12	0.43	Physical environment	0.3096
						Management system	0.2365
						Safety and health guarantee	0.2107