By default, a priority code 19 is assigned to the order when it’s created. When Ford is looking at orders for scheduling, if they see your order and an identical one but with a priority code of 18; the order with 18 would be selected first.
if there was an order with a priority code between 17...
Dealers are the ones that set priority codes when placing an order - specifically for retail order - they’ll assign 10 through 19. 19 being the default and 10 being the best.
Below 19 is a stock order. Above 10 are set by the region, hq, plant, etc.