| Upper Bound Optimism Bias (%)24 | Non-Standard Civil Engineering | Standard Civil Engineering | |||
| 25 | 66 | 20 | 44 | ||
|
| Capital Expenditure | Capital Expenditure | |||
| Risk Area Contributions to Upper Bound Optimism Bias (%)25 | Non-Standard Civil Engineering | Standard Civil Engineering | |||
| Procurement | Complexity of Contract Structure | 4 |
|
|
|
| Late Contractor Involvement in Design | < 1 |
|
| 3 | |
| Poor Contractor Capabilities | 2 |
| 16 |
| |
| Government Guidelines |
|
|
|
| |
| Dispute and Claims Occurred | 16 |
|
| 21 | |
| Information management |
|
|
|
| |
| Other (specify) | 1 | 2 |
|
| |
| Project Specific | Design Complexity | 5 | 8 |
|
|
| Degree of Innovation | 13 | 9 |
|
| |
| Environmental Impact |
| 5 | 46 | 22 | |
| Other (specify) | 3 |
|
| 18 | |
| Client Specific | Inadequacy of the Business Case | 3 | 35 | 8 | 10 |
| Large Number of Stakeholders |
|
|
|
| |
| Funding Availability |
| 5 | 6 |
| |
| Project Management Team |
| 2 |
|
| |
| Poor Project Intelligence | 3 | 9 | 14 | 7 | |
| Other (specify) |
|
|
|
| |
| Environment | Public Relations |
|
|
| 9 |
| Site Characteristics |
| 5 | 10 | 3 | |
| Permits / Consents / Approvals |
|
|
|
| |
| Other (specify) |
|
|
|
| |
| External Influences | Political | 19 |
|
|
|
| Economic | 24 | 3 |
| 7 | |
| Legislation / Regulations |
| 8 |
|
| |
| Technology | 6 | 8 |
|
| |
| Other (specify) | < 1 | 1 |
|
| |
_____________________________________________________________________________________________________
24 Note that these are only indicative starting values for calculating optimism bias contributions, because a project's optimism bias profile (contributions from project risk areas) will change during its project life-cycle.
25 Contributions from each project risk area are expressed as a % of the recorded optimism bias. Note: The sum of individual percentages contributions in each column may not add up to 100% due to rounding errors.