Table 8.

RII ranking for Materials-related delay factors.

S/N	Materials-related causes of delay	RII	RII ranking	Level of contribution
1	Materials procurement difficulties (Lateness)	0.763	2	High
2	Shortage/lack of materials in the market place	0.758	3	High
3	Increase/Fluctuation in the prices of materials	0.792	1	High
4	Delay in the delivery of materials	0.738	4	High
5	Changes in material types during construction	0.708	5	High
6	Damage of sorted materials that are needed urgently	0.650	6	High