Shipment Cost Relevant
Do you know what are the criteria so that a shipment can be considered as shipment cost relevant? (so that the ShipmntCostsRelv field is ticked)
Try this configuration link. it tells you how to configure the Shipment cost.
The Pricing Procedure tells us the condition types which can be used for the shipment cost.
If you assign it to the Shipment, then while creating the shipment cost, you will be able to use the condition types assigned to it for creating the cost.