Comparison of similar studies
| Comparison items | Xia et al. (2014) | This study |
|---|---|---|
| Number of RFPs | 49 | 102 |
| Issued period of RFPs | 2000–2013 | 2024–2025 |
| Sustainability requirements for contractor evaluation | ||
| Sustainability is a separate factor with quantifiable weighting | 26% | 45% |
| Sustainability requirements are reflected in other selection factors | 41% | 8% |
| No sustainability requirements | 33% | 47% |
| Sustainability weightings in RFPs | ||
| None | 33% | 55% |
| 1–5% | 24% | 16% |
| 6–10% | 27% | 22% |
| 11–20% | 12% | 8% |
| 21–30% | 4% | 0% |
| Comparison items | This study | |
|---|---|---|
| Number of RFPs | 49 | 102 |
| Issued period of RFPs | 2000–2013 | 2024–2025 |
| Sustainability is a separate factor with quantifiable weighting | 26% | 45% |
| Sustainability requirements are reflected in other selection factors | 41% | 8% |
| No sustainability requirements | 33% | 47% |
| None | 33% | 55% |
| 1–5% | 24% | 16% |
| 6–10% | 27% | 22% |
| 11–20% | 12% | 8% |
| 21–30% | 4% | 0% |
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