Hi Chandrakanth.
1) Using writeback to DB and a DB connector to BW. How to Guide http://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/c06e1bc4-0475-2c10-ada3-aa46c8059780?overridelayout=t…
2) Here is the link to a Case Study - Implementation of PCM with extraction to BW http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/10318380-137e-2e10-6b86-e8bc21b7ea58?QuickLink=index&…
Hope this helps.
Regards
Michael