Transportation Stages and Dates/Times in the Freight Unit 
Transportation stages and dates/times are copied from the forwarding order to the freight unit. Only the dates/times are copied from order-based and delivery-based transportation requirements.
The following section describes special features related to transportation stages and dates/times in the freight unit.
If a freight unit contains transportation stages because they were predefined in the business document, transshipment must take place. In this case, you cannot delete the related transportation stops at a later point in time.
If transportation stages result from manual planning or VSR optimization for a freight unit, these transportation stages reflect the transshipment. In this case, you can change the related transportation stops at a later time, for example, delete or add further transportation stops. You can only delete if the transportation stage has not been planned (that is, you have to cancel the assignment to a freight order or a freight booking for the transportation stage).
Example
For a forwarding order, goods must be transported from A to Z. The freight unit generated from the forwarding order also goes from A to Z. In planning you refine this, since it is to be a multimodal transport. This results in the freight unit being transported from A to Z via B. These transportation stages are mapped to the freight unit accordingly. This applies for manual planning and for VSR optimization.
After the freight units are generated, the dates/times of the business document are available in the freight unit (in the transportation stages). Windows for pickup and delivery are also copied to the freight unit from the business document.
You can overwrite windows for pickup and delivery. To do this, you must define a condition (see Condition) and enter it in the freight unit type in Customizing or enter a corresponding rule in the freight unit type. The system then calculates the window when generating the freight unit and displays it in the freight unit.
You cannot change dates/times that are copied from the business document. These dates/times can only be changed using the condition you defined for your window.