shipment order vs Distribution Order

​@ronhu one major difference I see in SOs in comparison to DOs is the ability of moving goods between sites without orders i.e. POs, COs. Shipment order would allow moving goods with the Shipment and receive from Register Arrivals without orders. 

some material which you might have also seen - IFS Cloud 21R1 – Shipment Order Overview and Demo Presentation | IFS Community