Assigning ‘Not Yet Assigned’ Quantities Manually 
The system then automatically subtracts the quantity you assigned from the ‘not yet assigned’ quantity.
If you then make any further changes, the system readjusts the ‘not yet assigned’ quantity.
If, for example, you decrease or delete the assigned quantity, the system increases the ‘not yet assigned’ quantity again.

The system makes these changes in simulative mode.
When you save your data, the system updates the data on the database. In the background, the planned orders are changed or deleted.