Table 1.
Delay causes of construction projects.
| Delay group | Causes |
|---|---|
| 1. Owner related | 1.1 Slow decision making |
| 1.2 Suspension of work | |
| 1.3 Late in revising and approving design documents by owner | |
| 1.4 Delay to furnish and deliver the site to the contractor | |
| 1.5 Delay in finance and payments of completed work by owner | |
| 1.6 Variation orders/changes of scope by owner during construction | |
| 1.7 Type of project bidding and award (negotiation, lowest bidder) | |
| 1.8 Unrealistic contract duration | |
| 1.9 Ineffective delay penalties | |
| 1.10 Owner interference | |
| 2. Consultant related | 2.1 Inadequate experience of consultant |
| 2.2 Delay in approving shop drawings and sample materials | |
| 2.3 Mistakes and discrepancies in design documents | |
| 2.4 Unclear and inadequate details in drawings | |
| 2.5 Quality assurance/control | |
| 3. Contractor related | 3.1 Difficulties in financing project by contractor |
| 3.2 Poor site management and supervision | |
| 3.3 Ineffective planning and scheduling of project | |
| 3.4 Rework due to errors during construction | |
| 3.5 Delays in sub-contractors work | |
| 3.6 Inadequate contractor experience | |
| 3.7 Delay in site mobilization | |
| 3.8 Delay in preparation of shop drawings and material samples | |
| 4. Material related | 4.1 Shortage of construction materials in market |
| 4.2 Delay in material delivery | |
| 4.3 Changes in material types and specifications during construction | |
| 5. Labor & equipment related | 5.1 Shortage of labors |
| 5.2 Unqualified workforce | |
| 5.3 Low productivity level of labors | |
| 5.4 Equipment availability and failure | |
| 6. Project related | 6.1 Effects of subsurface conditions (e.g., soil, high water table, etc.) |
| 6.2 Traffic control and restriction at job site | |
| 6.3 Unavailability of utilities in site or Delay in providing services from utilities such as (water, etc.) | |
| 6.4 Accident during construction | |
| 6.5 Problem with neighbors | |
| 7. External related | 7.1 Weather effect (hot, rain, etc.) |
| 7.2 Environmental restrictions | |
| 7.3 Changes in government regulations and laws | |
| 7.4 Slow permit by government/municipality | |
| 7.5 Delay in performing final inspection and certification by a third party | |
| 7.6 Lack of communication between the parties | |
| 7.7 Fluctuations in cost/ currency | |
| 7.8 Force Majeure as war, revolution, riot, strike, and earthquake, etc. | |