Typical problems with resource assignment and manpower in project management include:

1. **Overallocation of Resources**: Assigning more tasks to individuals than they can handle, leading to burnout and decreased productivity.
2. **Resource Conflicts**: Multiple projects or teams needing the same resources at the same time, causing delays and resource contention.
3. **Skill Mismatch**: Assigning tasks to individuals who do not have the necessary skills or experience, resulting in poor-quality work and increased need for supervision.