When using Pick, Pack, and Ship in 2019 R1, the system will error on an over shipment - meaning that they are trying to ship more than required for the shipment. However, on shipment where they short ship an item their is no warning at all. So for example, if they need to ship 2 units and they only scan 1 unit. Or they thought they scanned an item and it didn't scan. There is absolutely no warning when they confirm the shipment. When they look at the shipment the quantity to ship is updated to the quantity scanned. So unless someone compares every shipment to the original sales order they will not know that they either short shipped or didn't bill for everything they shipped.