Here's a breakdown of all the possible risks I know of:
- Scheduling Risks: The project manager underestimated the length of tasks and they are just taking more time. Schedule risks are accounted for in the contingency in the schedule.
- Cost Risks: Scheduling risks often lead to cost risks, a budget contingency plan needs to be drafted to handle cost risks. Cost risks may also result from missing requirements (for example, in a construction project, the project manager did not gather the requirement properly, and misses that the floor must be made out of marble, which greatly increases the costs of the project).
- Technology Risks: For example, choosing an obsolete technology to develop the project.
- Business process risks: Which include governance risks, management risks, and operational risks (purchasing [paying too much for the supplies], marketing [weak marketing of the product], and selling risks [weak distribution of the product]).
- Legal Risks: For example, a building is being constructed on "questionable" land. This will result in legal battles and will divert the attention from making the project succeed to resolving the legal issues.
- Competition Risks: Another company is trying to do the same thing (usually for less).
- Market Risks: Includes inflation, recession, bank interest rates, unemployment, etc...
- Acts of Nature Risks: Floods, earthquakes, and other natural catastrophes.
- Country Risks: Including wars, civil unrests, blockades, corruption.