ASCP Model question

Currently we have 5 inventory orgs in ASCP and fundamentally they can all be source suppliers of other orgs. Down the road we are considering creating a new org which will be considered a "fabrication" org. It will definitely supply all the other orgs and no orgs will supply it. Think of it almost like a supplier. By the way the original 5 will still operate as they have sourcing between themselves for subassemblies and buy items. The thought we are toying with is to have the fabrication org somehow run to a constrained plan. Currently the original 5 run