Dear Bach,
I am not the expert of the BI reporting toola and we did got to this requirment level but my suggestion from side
1.During staging area you have find out the structures and table which hold data and can built your extractors on them.
2.if the CR went to the active area you can set up the extractors pointing to those tables,
and setup extract reoprts from them not sure this will hep you.
regards
shankar