Hello Manikandaraja,
For the query of reports
The EHP5 is giving OLC Business function as Operation level costing, so they must be giving some related reports too on this. Becuase I'm still at EHP0, I'm afraid my knowledge on this subject about standard available reports on OLC is not adequate. In fact this is a big subject. You should go through thee Google links to study this further . Also this scn specific.
Regards
KJogeswaraRao