Dolce can make a Manager On Duty (MOD) designation based on Role
From the Gearwheel, go to Role Settings
Click the Gearwheel associated with a Role
Check the Mgr on Duty checkbox.
Employee's working this role will carry MOD status.
The MOD status if visible on the schedule
All employees can see on their dashboard or mobile who the MODs are for the current day, and their contact information.
You can assign custom permissions to employees while they are working in an MOD capacity from Permissions Settings (Gearwheel Menu > General Settings > Permission Templates)