| Factors affecting the performance of project consultants | N | RIA | RII (%) | Rank |
| 1) Related to Management of Project |
|
|
|
|
| Adequate technical background | 90 | 4700 | 52.22 | 20 |
| Poor relationship among team members | 90 | 2350 | 26.11 | 30 |
| Ability to coordinate | 90 | 5400 | 60.00 | 11 |
| Ability to make decisions when necessary | 90 | 6650 | 73.89 | 4 |
| Competence of the team | 90 | 4175 | 46.39 | 22 |
| Ability to delegate authority | 90 | 5300 | 58.89 | 14 |
| Ability to work as a team | 90 | 7575 | 84.17 | 1 |
| 2) Related to Cost Management |
|
|
|
|
| Accurate and reliable budget estimate | 90 | 5775 | 64.17 | 7 |
| Ability to foresee and budget for potential inflation | 90 | 5150 | 57.22 | 15 |
| Excessive variation orders | 90 | 4025 | 44.72 | 23 |
| Proper planning and scheduling of works | 90 | 5625 | 62.50 | 9 |
| Creativity in controlling their own cost and developing their efficiencies | 90 | 7125 | 79.17 | 2 |
| 3) Related to Quality of Work |
|
|
|
|
| Design team experience | 90 | 4975 | 55.28 | 17 |
| Delay in producing design document | 90 | 2550 | 28.33 | 29 |
| Adequate material test records | 90 | 5100 | 56.67 | 16 |
| Excessive variation orders | 90 | 2875 | 31.94 | 27 |
| Excessive errors or omission | 90 | 3325 | 36.90 | 26 |
| 4) Time Related |
|
|
|
|
| Coordination of contractors’ work promptly | 90 | 6025 | 66.94 | 5 |
| Timely decision making | 90 | 5725 | 63.61 | 8 |
| Timely submission of reports, payment certification, and claims | 90 | 6975 | 77.50 | 3 |
| Time for completing major specified work sections | 90 | 3725 | 41.39 | 24 |
| 5) Environmental Related |
|
|
|
|
| Political influence from higher authority | 90 | 5875 | 65.28 | 6 |
| Economic influence in terms of remuneration and allowances | 90 | 5575 | 61.94 | 10 |
| Social in terms of family relations | 90 | 2725 | 30.28 | 28 |
| Weather influence | 90 | 4825 | 53.61 | 19 |
| Level of technological advancement | 90 | 5375 | 59.72 | 12 |
| 6) Others |
|
|
|
|
| Project type | 90 | 4525 | 50.28 | 21 |
| Project value | 90 | 5325 | 59.17 | 13 |
| Project duration | 90 | 4900 | 54.44 | 18 |
| Urgency | 90 | 3575 | 39.72 | 25 |