Delivery Splits Triggered by SAP ERP 
You can split an outbound delivery or inbound delivery in SAP ERP or in the SAP Extended Warehouse Management (SAP EWM) application and trigger the required changes in SAP TM. If SAP EWM triggers the split, the delivery split is processed in SAP ERP first and then transferred to SAP TM.
You have created a delivery-based transportation requirement (DTR) in SAP TM based on an SAP ERP delivery.
If required, you have defined a delivery split/update type in Customizing for Transportation Management under .
In the delivery/split update type, you define how the system updates freight unit planning after the delivery split has been performed in SAP TM. Note, however, that the system checks this setting only if the planning changes cannot be determined based on other criteria (for example, the application that triggered the split). For more information about the criteria and the sequence in which they are checked, see the field help for the Handle Planning Results field in the Customizing activity Define Delivery Split/Update Types.
You have assigned the delivery split/update type to the delivery-based transportation requirement type in Customizing for Transportation Management under .
Split delivery (SAP ERP)
SAP ERP splits a delivery that has already been sent to SAP TM. SAP ERP sends the following information in separate messages:
The new delivery that has been created for the items split from the original delivery. The data sent includes a reference to the original delivery and the triggering application SAP ERP or SAP EWM.
The changed original delivery. The data sent includes a reference to the new delivery.
Create new DTR and update original DTR (SAP TM)
SAP TM creates the new DTR first by reassigning the freight units from the original DTR to the new DTR. It then updates the original DTR.
SAP TM receives a new or updated delivery using the Maintain Transportation Request (IntracompanyTransportationRequestRequest_In) enterprise service in the Transportation Request Processing process component.
Update freight unit planning (SAP TM)
The system determines the required changes to freight unit planning for the freight units assigned to the new DTR and the original DTR. For example, the system discards the planning of the freight units assigned to the new DTR and keeps the planning of the freight units assigned to the original DTR.