Can anybody explain me how "Generate Planned DRP orders - trdrp0212m000" session working?

It reads:
- the table trdrp010 where the distribution structure is defined. Here, the final (destination) warehouses must be no-nettable warehouses
- It calculates the net requeriments of material in this warehouses by date (the sales forecasts - stock - the reciepts forecasts by warehouse/item/date)
- It generates suggestioned rpl orders, between warehouses depending of the distribution structure in trdrp010 table

Regards