To allocate specific employees to the project, you can attach project participants to each iteration (project phase or stage): the people who are planned to do tasks in that iteration and in the project as a whole:
In the Task workload module, the system shows the planned occupancy of employees for the iteration or work phase:
If conflicts arise because employees are also involved in other projects (or other iterations), the system shows them as overload.
If employees must be used in the same time interval on different projects, use the "Daily availability" parameter when specifying participants for an iteration. For example, 4 hours on one project and 4 hours on another.