Carrying Out the Activity Backflush 
Use
If more (or less) activities are used to produce a material than you posted, you can use this function to repost the excess (or reduced) activities.
It may be necessary to do this if a difference exists after backflushing the planned and actual activities. These differences have to be balanced.
Procedure
The system displays the screen for backflushing activities.
This allows you to differentiate between posting a balance and posting a complete activity. When posting the complete activity, enter the appropriate reference quantity here.
The system proposes the operations, for which you can post a balance.