Table 4.
Top ten delay causes ranked according to Importance Index.
| Delay group | Cause | Imp.I |
|---|---|---|
| Owner related | 1.5 Finance and payments of completed work by owner | 58.54 |
| Owner related | 1.6 Variation orders/changes of scope by owner during construction | 56.57 |
| Project related | 6.1 Effects of subsurface conditions (e.g., soil, high water table, etc.) | 56.47 |
| Labor & equipment | 5.3 Low productivity level of labors | 55.61 |
| Contractor related | 3.3 Ineffective planning and scheduling of project | 55.36 |
| Contractor related | 3.1 Difficulties in financing project by contractor | 54.96 |
| Owner related | 1.7 Type of project bidding and award (negotiation, lowest bidder) | 53.27 |
| Material related | 4.1 Shortage of construction materials in market | 51.24 |
| Owner related | 1.3 Late in revising and approving design documents by owner | 50.84 |
| Labor & equipment | 5.2 Unqualified workforce | 48.64 |