Within PS it is easy to identify when an opportunity has been ordered, by way of processing the order against the opportunity and status updates.
Where a separate accounting system is used to dispatch and invoice, it would be so helpful if on PS, if the opportunity order could display the Invoice number to indicate that this opportunity has now been processed in full.
This would therefore allow a quick overview of any actions outstanding from the main CRM, particularly for users who do not have access to the accounting system.