Hi Uday.D -
You could also start by checking these three notes:
OBIEE 11g Test-to-Production (T2P) / Clone Procedures Guide (Doc ID 1625533.1)
OBIA 11g How to Migrate Configurations and Customizations from Development to a Test or a Production Environment (Doc ID 1984269.1)
How To Move ODI From Test Environment To Production Environment Using Cloning (T2P) (Doc ID 2011064.1)
I believe Oracle's official position on OBIA, not OBIEE, is to do a fresh install of it on the DR server(s) and move your customizations, catalog objects, etc. post-install. I have asked this in an SR, but you should also confirm yourself.
That said, it is possible, although not recommended (possibly not even supported) to use the T2P scripts. I have done this for the OBIA application tier, but it was a lengthy, manual, error-prone process. Looking back, it may have been easier to just do it as a fresh install, then move all the other stuff back into it.
Just my perspective. Also, maybe move this over to the OBIA board, since the process is different than "OBIEE".