Business Content activation

Hi,

if I use the Business Content, can I trust the system without checking anything?

I mean can I just activate, DataSource - InfoPackage - Transformation - InfoSource - Cube - Aggreagte and the Dataflow

will work as it should?

What if I activate something I dont really need? In my opinion nothing will happen if I activate more than I actually need!?

I mean I am doing it the first time, so I am not quite confident...