Hi Naveen,
I don't think you have searched properly, try to search more on SCN search itself.
In summary , after enhancing the Ds in R/3 side :
You should unlock the locked users.
Replicate the DS in BW.
Create the flow for data load if not there.
Test the loading of data to confirm if the delta field is coming to BW or not.
Best Regards,
Arpit