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All comments above are very valuable inputs depending on their project situations. I just roughly list some categories of risks for construction domain based on my experience in various international civil projects for over 15 years. All listed below might be dependent on the real situations and durations in different projects since longer period will impose much more uncertainties in planning and executing the project.
1. Performing Organization
1.1. Resources
1.1.1. H/R
1.1.2. Equipment
1.1.3 Materials
1.2. Culture, communication and management engagement
1.3. Supporting departments
1.4. others
2. Client
2.1. Client Organization
2.1.1. Duplicated roles or responsibilities or vague communication channels
2.1.2. Biased decisions in conflict of interests.
2.1.3. Lack of expertise
2.2. Client Representative
2.2.1. Biased decisions
2.2.2. Lack of power
2.2.3. Lack of expertise
3. Design
Unclear design issues might create huge uncertainty impacts.
4. Site Condition
Unforeseen site conditions might be compensated though claim procedures but may not all.
5. Contract
Type of contract, unclear and/or arguable stipulations, procedures on unclear design and unforeseen site conditions etc. So many contract issues might affect the overall performance of project.
6. Schedule
Schedule risks might be dependent on the experiences and technical skills of estimators and team members.
7. Costs
Cost risks might be largely dependent on the experiences and technical skills of estimators and team members.
8. Project manager's leadership and technical skills
9. Weather condition
10. Force Majeure
11. Sellers or subcontractors
12. Applicable law or regulations
13. Environmental and safety effects
14. Workers' health effects
15. Insurance
16. Regional cultures or practices( for International projects)
17. External stakeholders like relevant authorities and residents
18. Site acquisitions
19.Lack of historical information
20. Labor union.
