| Environmental Sustainability Variables | Mean | RII (%) | Rank |
| Environmental regulations | 3.52 | 70.32 | 1 |
| Pollution generation | 3.42 | 68.39 | 2 |
| Waste generation | 3.32 | 66.45 | 3 |
| Reuse of products | 3.26 | 65.16 | 4 |
| Changes in the environment lead to the discomfort of people and the biological system | 3.23 | 64.52 | 5 |
| Institutional interest to the environmental aspect | 3.16 | 63.23 | 6 |
| Communication of environmental management information | 3.13 | 62.58 | 7 |
| Recycling of products | 3.10 | 61.94 | 8 |
| Use of sustainable temporary facilities (such as desks and bathrooms) during the project | 3.00 | 60.00 | 9 |
| Integrated environmental and economic program | 2.97 | 59.35 | 10 |
| Environmental management technology | 2.94 | 58.71 | 11 |
| Use of recyclable/renewable materials | 2.94 | 58.71 | 11 |
| Ecology preservation | 2.90 | 58.06 | 13 |
| All items of the field | 3.14 | 62.88 | - |