The assignment of supervisors is done by assigning individual workers to their supervisors.
From your Admin portal, click on Workers, then select the worker profile from the list.
Underneath the Position option, you can click Select Supervisor. This will open a pop-up and you can select the supervisor's position and name from the drop-down.
Click Submit then Save Profile.
Now when you log in as Phil Dunphy, you'll be able to see your subordinates and their compliance from your dashboard.