Order Management allow you to split order lines to meet customer needs.  Until the product is shipped, the customer can request to change the shipping address or date for part of the order line.  To meet such requests, split the order line into multiple shipments.  These are referred to as user initiated splits.

Select the order line to be split. Choose the Actions button from the Sales Orders window and select Split Line.
The Split Line window displays with one record with the Request Date, Ship to and Warehouse defaulted from the original line.
•    Enter the quantity.
•    Create new records as per your split requirement.
•    Choose the Split button to confirm the split.
Note:  Splitting is the only way in which you can create multiple shipments for a given order line.
When you click OK to close the window, the new shipment lines are created and can be seen in the Sales Order form.  If you split line 1.1 into 2 shipments, you will end up with lines 1.1 and 1.2.

Configurations
Split only at the top-level line in a configuration, i.e. you can split only a model line and not at the option or class level.  Split only a kit line and not at the included item level.  When a model or kit line is split, Order Management splits each item beneath the model proportionately. 

When a configuration or kit is shipped out of proportion, the system creates remnant sets.  Lines in a remnant sets are treated as standalone lines by shipping and fulfillment.  Remnant sets can arise only out of system initiated splits. 

System initiated splits
Order Management splits order and return lines into multiple shipments when they are partially processed.  Such system initiated splits occurs as follows:
When Order Lines are partially processed at:

When Return Lines are partially processed at:

For both user and system initiated splits, Order Management retains all of the original line information including attachments, discounts, flow status, sales credits, reservations, taxes, and holds.