Table 7 Ranking of group causes.

From: Determinants of road construction project delay in the case of Woliso–Ambo road construction

No.

Group

∑RII

Rank

1

Escalation of the material price influence

3.98

1

2

Delays in subcontractors work influence

3.69

2

3

Material and equipment influence

3.64

3

4

Inadequate management and supervision by consultant

3.60

4

5

Peace and security situation

3.29

5

  1. The second highest-ranked factor was the impact of subcontractor work delays, with a relative importance index (RII) of 3.69. This was followed by the influence of material and equipment (RII = 3.64), inadequate management and supervision by consultants (RII = 3.60), and peace and security situations (RII = 3.29). The categories with the lowest RII were related to peace and security situations and inadequate management and oversight by contractors.
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