Not if you don't want to! You can select ship start dates per product in the working order. Just set the dates accordingly to create your deliveries.
When you hit SUBMIT, the system will automatically split the order based on ship start dates.
An extra number will be added to the end of each PO number, creating a unique number for each delivery. (e.g. 131703-1, 131703-2.) Items with the same delivery dates will be in the same order.