I don't even see the fields "Special Order" or "Drop shipment" any where on the order. Not in the header, the purchase lines, the shipping or invoicing fields. Where are these located?
I am not using a reservation system. I sell flow measurement devices with transducers that may have multiple calibrations. Each calibration is a line item and the customers are constantly changing these after they place their order. It should not be a big deal, as they are the last step before the order is prepared for shipment. Our manufacturing times are twice the normal expected time for the market, so I try to enter the order as soon as I have a valid PO. But not being able to make any changes is crippling.