Hi Nitesh,
Below links are helpful.
http://wiki.sdn.sap.com/wiki/display/BI/BW+Statistics+and+RSDDSTAT*+views,+tables
http://help.sap.com/saphelp_nw04/helpdata/EN/80/1a66d5e07211d2acb80000e829fbfe/content.htm
https://scn.sap.com/message/3470690
http://help.sap.com/saphelp_nw70ehp2/helpdata/en/44/3521c7bae848a1e10000000a114a6b/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/8c/131e3b9f10b904e10000000a114084/content.htm
http://help.sap.com/saphelp_nw73ehp1/helpdata/en/44/3521c7bae848a1e10000000a114a6b/content.htm
http://help.sap.com/saphelp_bw30b/helpdata/en/f2/e81c3b85e6e939e10000000a11402f/content.htm
Regads