Setup Delivery Address based on quantity on PO

Hi Expert,

In my situation, my company purchase goods from vendors.

Depends on the historical data and order qty on the PO, i have to make a plan to distribute qty to site.

How could i implement this in SAP?

If i have my own logic for the distribution (e.g. : distribute by district, by previous sales performance, etc) how could i implement this logic to SAP?

Thanks a lot.

BR - Chris