Moving Production Quantities on the Time Axis 
Use
Planned production quantities that lie before the date used to access the planning table are totaled and are displayed in the first column of the planning table as Overdue quantities.
You can move these open production quantities from past periods into the future.
You can also use this function to displace any production quantity either backward or forward on the time axis.
Prerequisites
You must have defined the distribution function appropriately in Customizing for the Planning Table in the IMG activity Distribution for the Planning Table. Even distribution is the standard default.
Procedure
The system distributes the production quantities to the period you selected.