basis activities in APO DP and PP/DS

Experts:

I am assigned to provide SAP basis support for company's first APO DP and PP/DS implementaion.

I have done some research but found no where saying what SAP basis can do for APO DP and PP/DS project.

My background is ECC/BW/BI/PI.

Could you please tell what is the basis job in an APO DP and PP/DS implementaion?

Thanks in advance.