Causes of Delay in the Construction Projects of Subway Tunnel

Table 7

Ranking of the causes from labor.

Cause	View of consultants		View of contractors		Combined view
	Rank	Severity index	Rank	Severity index	Rank	Severity index
Low productivity of laborers	1	68.25	1	70.60	1	69.43
Insufficient laborers	3	61.87	2	65.42	2	63.65
Low skill level of equipment-operator	2	63.18	3	61.75	3	62.47
Personal conflicts among laborers	4	50.37	5	46.52	4	48.45
Conflict between laborers and management team	5	46.91	4	47.39	5	47.15