Create a PO for 100, set the underdelivery as 5 %. that means allowed under delivery is 95.
During the packing slip, set the quantity as 90 and select the “Close” check box and try processing it. System wont allow you because allowed under delivery is 5% but your under delivery is 10%.
Now, set it 95 and select “close” check box and process. You can see the order status gets changed to “Delivered”