Now it looks like this:
The user selects the approval when creating incident selects from the Select Approvers:
After the update, it is not possible to force a user to use field Select Approvers.
If in the Work flow I put the value of the DEPT_HEAD and the user does not have the superior set in this Department will be created with the status open and bypassing the subsequent stages of acceptance.
For me, this is an error because the notification should be approved by the three levels of acceptance and change the status to open.