Hi,
Info pack - its always loads data from source system to PSA
DTP - its loads data from psa to further any targets.
So you can use simple process chain like
Start variant---> info pack---->delete index(cube) --->dtp-->create index(cube)-->rollup if exist.
You can add your info pack and dtp by using related process types.
Assumed as your loading data to cube.
Thanks
