Assessing the Causes of Time Overrun in Building and Road Construction Projects: The Case of Addis Ababa City, Ethiopia

Table 4

The overall ranking of the factors.

SN	Influencing factors	RII	Rank	Group/Category
1	Reluctance of consultants	0.843	1	Consultant related
2	Inaccurate estimation of contract period	0.836	2	Client related
3	Delay in approvals and late decision making	0.821	3	Client related
4	Slow mobilization of labor	0.809	4	Labor related
5	Some tendering maneuvers by contractors	0.749	5	Contractor related
6	Slow response and poor inspection	0.739	6	Consultant related
7	Delay in payment to supplier/subcontractor	0.716	7	Financial related
8	Inflation/prices fluctuation	0.708	8	External Env’t related
9	Poor procurement of materials	0.703	9	Material related
10	Problem with neighbors (right of way issue)	0.701	10	External Env’t related
11	Incomplete drawing/detail design	0.699	11	Consultant related
12	Poor site management and supervision	0.682	12	Contractor related
13	Change in the scope of the project	0.679	13	Client related
14	Late issuance of required permits to work	0.679	13	Gov’t authorities related
15	Unforeseen ground condition	0.674	14	External Env’t related
16	Government authorities and bureaucracy	0.665	15	Gov’t authorities related
17	Inadequate monitoring and control procedures	0.653	16	Consultant related
18	Shortage of construction materials	0.653	16	Material related
19	Lack of technical knowledge by client	0.651	17	Client related
20	Client’s interference	0.650	28	Client related
21	Inadequate consultant experience	0.648	19	Consultant related
22	Client’s financial difficulties	0.648	19	Financial related
23	Problem with neighbors	0.638	20	Social and economic related
24	Frequent equipment breakdown	0.632	21	Equipment related
25	Availability of required materials, manpower	0.631	22	Social and economic related
26	Delay in connecting utilities	0.631	22	Gov’t authorities related
27	Escalation of material prices	0.619	23	Material related
28	Inadequate contractor experience	0.615	24	Contractor related
29	Absenteeism	0.612	25	Labor related
30	Shortage of equipment parts	0.610	26	Equipment related
31	Complexity of engineering design	0.602	27	Consultant related
32	High interest rate	0.595	28	Financial related
33	Deficiencies in drawings and specifications	0.585	29	Consultant related
34	Nonproductivity of labor and equipment	0.578	30	Contractor related
35	Contractor’s financial difficulties	0.576	31	Financial related
36	Culture and traditional conflicts	0.574	32	Social and economic related
37	Low labor productivity	0.573	33	Labor related
38	Issues and conflicts among workers	0.573	33	Social and economic related
39	Absence of supervision staff from the site	0.568	34	Consultant related
40	Equipment allocation problem	0.568	34	Equipment related
41	Rework due to mistakes in construction	0.564	35	Contractor related
42	Coordination issues and quality of work	0.562	36	Contractor related
43	Slow mobilization of equipment	0.557	37	Equipment related
44	Changes in requirements and regulations	0.556	38	Gov’t authorities related
45	Change orders	0.554	39	Client related
46	Dispute of subcontractors and consultants	0.550	40	Contractor related
47	Slow site clearance	0.549	41	External Env’t related
48	Unreliable suppliers	0.544	42	Material related
49	Contractor management incompetency	0.530	43	Contractor related
50	Shortage of skilled labor	0.526	44	Labor related
51	Insufficient number of equipment	0.526	44	Equipment related
52	No incentives to contractors	0.501	45	Client related
53	Low motivation/morale	0.501	45	Labor related
54	Inadequate fund allocation	0.496	46	Financial related