Hello, thank-you for your interest in the MedRez.net Scheduling Tool.
This depends a bit on your situation. You can use Areas to limit who can be on certain calls (if you put a call in an "Area", only residents who are in that Area can be in that call). If the residents who can work in that call change each day, then you might have to deal with that situation by hand.
The Scheduling Tool will help you figure out who is eligible for that call, and will warn you if they break duty hour rules (such as being on a shift again the next day).
I hope that helps. Regards,
Olivier Forget
Owner and Developer
MedRez.net Scheduling Tool