Causes of Delay in the Construction Projects of Subway Tunnel

Table 16

Severity index difference of the top six causes between consultants and contractors.

Cause	Overall rank	Severity index		Absolute difference in severity index
		Consultants’ view	Contractors’ view
National policy for subway tunnel construction	1	73.81	76.52	2.71
Complicated geological conditions	2	74.38	73.62	0.76
Progressing payments delay by the owner	3	71.72	72.65	0.93
Award the project to lowest bid price	4	71.16	72.05	0.89
Shortage of advanced large equipment	5	69.52	71.08	1.56
Low productivity of laborers	6	68.25	70.6	2.35