Limiting PS to one Department in Discrete Environment

Hello, i'm trying to understand how i can implement Production Scheduling module within an organization but limit the plan results to one department (as we want to pilot in only one area).  We currently have ASCP implemented and i have that plan referenced on the Scope tab.  How exactly do i use ASCP but limit plan output for only one department in the plant.  How do i ensure they don't publish other planned orders in other departments.

Also, what is the main plan result?  Is it the resource capacity view?

Sorry for all the questions but I'm really trying to learn PS and how it can help our plants that are struggling planning discrete jobs without a planning tool.