Hi @THMOBR,

Which IFS version are you useing? 

In IFS10 i think it's the field which is higlighted with the red border in screenshot below:
If “100” is entered there, the new requisitions should be multiple's of 100. 
Working depends or which planning method you are useing. Are you useing planning method G?

@THMOBR if you are using MRP to create Purchase Reqs automatically, then the way to go is what @SAKE suggested.

If you’re not using MRP, then you can set some attributes in Supplier for Purchase Part which would throw an info toast if the qty on the PO doesn’t meet the criteria defined in the Supplier for Purchase Part. However this will be just an info message, it will depend on the buyer to take action and increase the qty.

If you really want to block the process if the qty is not a multiple of Std Multiple Qty then you would need a custom event to show an error message and stop the flow.

@Marcel.Ausan , this is exactly what I need, but instead of displaying the message, the system itself adjusts the quantity!