Hi Raffaele
This is standard behaviour of the system.. CK11N is used to calculate prices for anonymous stock i.e. Make to Oorder scenario... System will calculate price for 1000 PC and then divide it by 1000 to get the price of 1 PC
however, when you create a prod order for 1 PC, Set Up time will remain as 1 Hr.. It wont be divided by 1000. You can check that in CO01
Br, Ajay M