Extraction of WBS Structure(KJH3) into BW with Delta

Hello All,

I have a requirement to extract a structure of WBS from ECC into BW. In BW, there will be authorizations setup on this hierarchy. These authorizations will use the technical node IDs as reference.(lets say untill level 4 out 7 of the hierarchy).

Therefore, with any change made to the structure in ECC (adding new nodes ) until level 4 , upon extraction in SAP BW, the technical reference of ALL nodes in the hierarchy will get updated.

What I would like to achieve is a only a delta transfer of the hierarchy after the initial load. So that there the entire hierarchy does not get refreshed each time.

How do I achieve this? Is this possible?

Please advise.

regards,

Abhi