Billing Plan 
Definition
You use the billing plan to plan the dates on which payment requests or invoices affecting sales are sent to customers.
The system determines the payment data and records it in the relevant WBS element. The planned revenue is recorded in the revenue element you defined in the planning profile for this WBS and the commitment item assigned.
Use
You use the billing plan for WBS elements in customer projects:
· At a very early stage in the project, when there are no sales documents
· To plan revenues in project versions (simulation)
The billing plan in the WBS element is for planning purposes only.
See also:
Calculating
the Planned Payment Flow Automatically