Causes of Delay in the Construction Projects of Subway Tunnel

Table 8

Ranking of the causes from environment.

Cause	View of consultants		View of contractors		Combined view
	Rank	Severity index	Rank	Severity index	Rank	Severity index
Complicated geological conditions	1	74.38	1	73.62	2	74.00
Poor terrain condition and wall rock quality	2	67.55	3	66.27	1	66.91
Weather condition	3	46.14	2	55.70	3	50.92
Poor effect on the drainage system	4	41.86	4	39.71	4	40.79
Natural disaster	5	38.15	5	39.09	5	38.62