Hello Deepak,
Ok, becuase for our last upgrade from NWBC 702 to 731 we did a copy of the DEV and QAS, like in the follwoing link: Upgrade Landscape Strategy - ERP Upgrade - SCN Wiki.
But I think it is better and faster with a SANDBOX system and this system should be a copy from the DEV system or PROD system?
Thanks,
Florin