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| Engineering firms | Contractors | Clients or developers | Regularity bodies | Government | Construction management | Educational institutions | Overall | ||||||||
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| SI | Rank | SI | Rank | SI | Rank | SI | Rank | SI | Rank | SI | Rank | SI | Rank | SI | Rank |
| Design errors | 83.08 | 2 | 98.50 | 1 | 93.33 | 1 | 100 | 1 | 91.25 | 2 | 91.11 | 1 | 90.91 | 2 | 91.23 | 2 |
| Incomplete design | 65.77 | 6 | 82.00 | 5 | 84.00 | 4 | 80 | 4 | 81.25 | 5 | 82.22 | 4 | 69.09 | 5 | 75.61 | 5 |
| Lack of communication between project parties | 81.92 | 3 | 88.50 | 4 | 90.67 | 3 | 80 | 5 | 80.00 | 6 | 75.56 | 6 | 78.18 | 4 | 83.48 | 4 |
| Time lag between design and construction phases | 74.62 | 5 | 77.00 | 7 | 57.33 | 7 | 60 | 7 | 68.75 | 7 | 68.89 | 7 | 56.36 | 7 | 70.19 | 7 |
| Estimation errors | 62.69 | 7 | 80.00 | 6 | 73.33 | 5 | 80 | 6 | 85.00 | 4 | 77.78 | 5 | 61.82 | 6 | 72.65 | 6 |
| Changes initiated by the client | 97.65 | 1 | 97.00 | 2 | 72.00 | 6 | 100 | 2 | 86.67 | 3 | 91.11 | 2 | 94.55 | 1 | 93.42 | 1 |
| Inconsistencies between contract documents | 80.00 | 4 | 91.00 | 3 | 92.00 | 2 | 100 | 3 | 95.00 | 1 | 91.11 | 3 | 83.64 | 3 | 88.00 | 3 |
| Different site conditions | 61.96 | 8 | 69.74 | 8 | 50.67 | 8 | 60 | 8 | 63.75 | 8 | 60.00 | 8 | 52.73 | 8 | 62.08 | 8 |
| Shortages of materials | 41.92 | 9 | 60.00 | 9 | 41.33 | 9 | 40 | 9 | 53.75 | 9 | 48.89 | 9 | 36.36 | 9 | 47.53 | 9 |