Table 5.

RII ranking for Contractors-related delay factors.

S/N	Contractor-related causes of delay	RII	RII ranking	Level of contribution
1	Difficulties in project financing	0.783	2	High
2	Errors during construction	0.696	8	High
3	Improper planning and preparation during construction project	0.721	6	High
4	Poor site management and coordination	0.700	7	High
5	Delays in sub-contractor's work	0.779	3	High
6	Underestimation or overestimation of the project cost	0.808	1	Very High
7	Conflicts between contractor and other parties	0.746	5	High
8	Delays in the mobilization of workers	0.650	10	High
9	Regular change of sub-contractor's technical staff	0.746	5	High
10	Conflicts in sub-contractor's schedule in execution of project	0.692	9	High
11	Underestimation of the project durations	0.763	4	High