Since description_revenue is an association 1 – 1, we can use the attribute revenue (as a decimal type) in the entity description and instead of Description give this entity the name Project.
The employee_project association should have the Project as the owner of the association. So we have reference of the employee in the project entity.
After this changes I think we can use a datagrid 2, to have a list of employees of each project in the last column.
Please let me know if this information was usefull