Plan Costs from Orders for Projects 
Use
When you assign an order to a project, the system takes over the plan costs when you save them, and records them in the project.
Prerequisite
In Project System customizing, you define, for the various order types, how the plan costs for orders are recorded in projects.
Features
There are two options:
These two options are independent of each other. An order may be either of these, or both.
Updating Appended Orders
If the order is "appended", the plan costs for the order increases the plan values in the project. They form the basis for determining the budget. This is a good idea, for example, if you are only planning in orders. The project plan is then the total of the order values.
Updating Apportioned Orders
The plan costs in an apportioned order increase the assigned values for the relevant WBS element. These values bind the budget until you close the order.

Changes to the actual and commitment values in an apportioned order only lead to changes in the assigned values in the relevant WBS element if the total for actual costs and commitments in the order exceeds the value of the order requisition (order plan costs).
In the standard system, networks and orders are flagged as "apportioned". For the planning phase, you can go to Project System customizing menu and switch off the "Funds assignments in plan" parameter for networks or orders. The order plan values do not then become part of the assigned values for the WBS element. If you release the order, the order plan values are recorded as funds commitments in the WBS element; the released order is automatically flagged as an appended order.
An exception is the case of the networks for preliminary planning. In Project System customizing, you stipulate which network types are used for preliminary planning. Such preliminary planning networks are never appended. The related plan values do not, therefore, increase the assigned value for the relevant WBS element.
You cannot enter a budget for orders for projects.

If you use active availability control, you must reconstruct the assigned values if you change how orders are updated. For more information, read the chapter on