SAP Note 18397 - Quantity-specific delivery costs for goods receipt

Symptom:

If a goods receipt takes place for a purchase order and a varying quantity is entered in the order price unit, this quantity is ignored when calculating the quantity-specific delivery costs.

Cause and prerequisites

Quantity-specific delivery costs are always posted in proportion to the order quantity. If 50% of the ordered quantity is delivered, then 50% of the planned delivery costs are posted upon goods receipt.
If the delivery costs are defined in a varying unit of measure, the conversion factor of quantity to purchase order unit defined in the condition is applied to the goods receipt. This also applies when the unit of measure in the condition is the same as the purchase order unit.

Reason:
It is possible to define units of measure with separate conversion factors in the condition. These always refer to the quantity in the order unit. Even when the unit of measure of the condition is the same as the order price unit, the conversion factor in the condition may still differ from the conversion factor for the order units.

Example: Order unit: ,, pc
Order price unit: ,, kg (1 pc = 90 kg)
UoM of the condition: ,, kg (1 pc = 100 kg)
For this reason, the conditions are always posted proportionally to the order quantity.

Solution
Plan your provisions for delivery costs in the order as precisely as possible. If necessary, you can manually change the planned delivery costs in the purchase order again before posting the goods receipt.
The actual delivery costs are adjusted upon invoice receipt.