| Types of Organization | Number of Questionnaires | Percentage Returned (%) | ||
|
| Sent | Returned |
| |
| Clients | 16 | 12 | 75.00 | |
| Project contractors | 29 | 23 | 79.31 | |
| Project consultants | 26 | 21 | 80.77 | |
| Design managers | 19 | 16 | 84.21 | |
| Quantity surveyors | 20 | 18 | 90.00 | |
| Total | 110 | 90 | 81.82 | |