Calendars and their effect on Supplier Price List

About to use capabilities to get Epicor to tell us what items need to be subcontracted based upon finitely scheduled load.

Does anyone have experience with shop calendars and “Days Out” on supplier price list? If the supplier resource is on a seven day per week calendar, does 7 on Days Out represent one week? And if so, if the calendar on the resource changes to a 5 day per week calendar, will the actual scheduled days on the unfirm job be reflective of days out against the 7 day calendar, or a 5 day calendar?