| Economic Sustainability Variables | Mean | RII (%) | Rank |
| Professional fees such as engineers and consultants | 3.29 | 65.81 | 1 |
| Energy cost | 3.23 | 64.52 | 2 |
| Use of full equipment capacity | 3.06 | 61.29 | 3 |
| Right-sizing of construction equipment | 3.03 | 60.65 | 4 |
| Inspection and maintenance of construction equipment | 3.03 | 60.65 | 4 |
| Cost of repairing errors and defects | 2.97 | 59.35 | 6 |
| All items of the field | 3.10 | 62.04 | - |