| Factors | Education level | Number of cases | Average value | Standard error | Minimum | Maximum value |
| Too much intervention by the owner | High school and below | 7 | 3.86 | 0.340 | 3 | 5 |
| College | 59 | 3.66 | 0.140 | 1 | 5 | |
| Undergraduate | 155 | 3.99 | 0.075 | 1 | 5 | |
| Master | 49 | 3.49 | 0.143 | 1 | 5 | |
| PhD and above | 2 | 3.00 | 0.000 | 3 | 3 | |
| Total | 272 | 3.82 | 0.060 | 1 | 5 | |
| Security incident | High school and below | 7 | 3.57 | 0.719 | 1 | 5 |
| College | 59 | 3.53 | 0.200 | 1 | 5 | |
| Undergraduate | 155 | 3.68 | 0.124 | 1 | 5 | |
| Master | 49 | 3.69 | 0.196 | 1 | 5 | |
| PhD and above | 2 | 2.00 | 0.000 | 2 | 2 | |
| Total | 272 | 3.63 | 0.092 | 1 | 5 | |
| Design work ignores buildability | High school and below | 7 | 3.43 | 0.429 | 2 | 5 |
| College | 59 | 3.78 | 0.135 | 1 | 5 | |
| Undergraduate | 155 | 3.79 | 0.081 | 1 | 5 | |
| Master | 49 | 3.39 | 0.154 | 1 | 5 | |
| PhD and above | 2 | 3.00 | 0.000 | 3 | 3 | |
| Total | 272 | 3.70 | 0.063 | 1 | 5 | |
| Poor information processing ability | High school and below | 7 | 3.29 | 0.565 | 1 | 5 |
| College | 59 | 3.24 | 0.140 | 1 | 5 | |
| Undergraduate | 155 | 3.28 | 0.081 | 1 | 5 | |
| Master | 49 | 3.29 | 0.149 | 1 | 5 | |
| PhD and above | 2 | 2.50 | 0.500 | 2 | 3 | |
| Total | 272 | 3.27 | 0.063 | 1 | 5 | |
| Use of new technologies, new materials and new processes in construction | High school and below | 7 | 2.57 | 0.571 | 1 | 5 |
| College | 59 | 2.47 | 0.144 | 1 | 5 | |
| Undergraduate | 155 | 2.74 | 0.090 | 1 | 5 | |
| Master | 49 | 2.73 | 0.154 | 1 | 5 | |
| PhD and above | 2 | 1.50 | 0.500 | 1 | 2 | |
| Total | 272 | 2.67 | 0.068 | 1 | 5 | |
| Uncertainty and changes in the surrounding environment | High school and below | 7 | 3.43 | 0.685 | 1 | 5 |
| College | 59 | 3.49 | 0.117 | 1 | 5 | |
| Undergraduate | 155 | 3.49 | 0.085 | 1 | 5 | |
| Master | 49 | 3.41 | 0.137 | 1 | 5 | |
| PhD and above | 2 | 2.00 | 0.000 | 2 | 2 | |
| Total | 272 | 3.46 | 0.062 | 1 | 5 |