Quantity by production rate functionality in planning table MF50

Hi

Could you please tell me how to customize the behavior of the functionality "Qty by production rate" to take on consideration the setup time maintained at routing level.

Actually if my machine time is 1 H and setup time 2 H and work center capacity 10 H per day, the quantity by production rate calculated will be 10 PCs and the 20 H for setup time will be externalized to backward days.

Thank you