Causes of Delay in the Construction Projects of Subway Tunnel

Table 9

Ranking of the causes from equipment and material.

Cause	View of consultants		View of contractors		Combined view
	Rank	Severity index	Rank	Severity index	Rank	Severity index
Shortage of advanced large equipment	3	69.52	1	71.08	1	70.30
Shortage in construction material	1	71.05	2	65.71	2	68.38
Lack of equipment efficiency	2	69.85	3	64.49	3	67.17
Changes in material types and specifications during construction	4	63.26	5	61.90	4	62.58
Serious damage to the equipment	6	59.85	4	62.31	5	61.08
Increasing prices of raw materials	7	56.30	6	59.47	6	57.89
Material loss in the process of transportation	5	60.17	7	55.28	7	57.73