I believe that headquarters has a Printer send out what ever notices have to be sent out.
Mean while some one else at headquarters, sends a Fax to which ever company designs & builds the Part in question.
They send the part(s) out to the FCA Warehouses
Then it is up to someone to tell the Dealership Parts Department, that the needed parts are in the company Warehouse.
Eventually, the Parts Dept. should inform the Service Dept. Advisers, that the parts are in stock.
On a couple occasions, i walk into the Parts Dept. & ask them directly if they have the part(s)