Copying Project Dates as Basic Order Dates 
Use
When you assign an order to a project, this means that the project dates represent the definitive basic dates for this order. The order can be assigned to a work breakdown structure (WBS) element or a network operation of the project.
If you assign the order to both a WBS element and a network, the system will always copy the dates for the network operation; they have priority over the dates in the WBS element.
Procedure
The system displays a dialog box.
If you copy the project dates, the system changes the basic order dates in the Dates section into the project basic dates.
If you do not copy the project dates, the original order dates remain decisive for scheduling.

In the Project System, you can update changed dates in the order using Copy project dates. This function is also available in the selection function for orders (list editing), so that you can update dates from several orders in one step.
See also:
Assigning an Order to a Project