For IR-ISO cycle - How to do the Partial quantity delivery at the time of shipment?

Hi,

Our instance is 11.5.10.2 having OPM ware houses. We are using IR ISO cycle for the inventory transfers. After the requisition , sales order import, user has done the picking (auto picking) of material 100 qty. After that, at the time of delivery user want to deliver only 80 qty because of truck size restriction.

How do we do the partial qty dilivery at shippment level? Is there any profile option or setups need to change?

Please provide the solution?

Thanks.