Field help (DDEMDLVDAT) 

This is the delivery date requested by the customer. This date is initially by the requested delivery date entered in the order header. The modification of this date will trigger the recalculation of the shipment date (Shipment date = Requested delivery date - Delivery lead-time) and will recalculate the planned delivery date (Planned delivery date = Shipment date + Delivery lead-time).

During the modification of this date, the system controls that this date does not correspond to a non-working day or an unavailable day for the delivery date. If this is a non-working day, the date is postponed, otherwise a warning message is displayed.
The system also checks that the entered date remains lower than or equal to the Maximum delivery date entered on each order line. If it is not the case, a message is displayed suggesting to also replace the Maximum delivery date with the entered date.

Inter-company specificities:In the case of an inter-company or inter-site order generated from a purchase order, the requested delivery date will be initialized by the planned receipt date entered in the purchase order line.