Billable Item Transfer 
To be able to invoice a customer for services, you first need to transfer the valuated usage instances to Billing in Contract Accounts Receivable and Payable.
Process
The following graphic shows the processing of a valuated item right up to the creation of the billing document.
Transfer and Administration of Billable Items
The following sections explain the values that control the transfer and further processing of billable items as well as providing examples for their usage and discussing the necessary Customizing settings.
Note
Billing in Contract Accounts Receivable and Payable works without time zones. That means that Billing in Contract Accounts Receivable and Payable adopts the unconverted date and time from the external rating and charging system.