Workflow in BW SEM/BPS

Hi Experts,

We are working in a solution to provide access for external users from sister companies to enter some plan data using SEM/BPS in BW (3.5).

This planning data is is very critical and we want to ensure that the management of these companies are aware and approving this data. Is it possible to integrate an SAP workflow approval to manage this solution?

Iu2019m thinking about a scenario where a nominated user should first enter the plan data, save it as plan version, and then submit for approval for his manager..Etc...

Any documentation on this regards will be very helpful.

Thanks a lot.