Purchase Orders - Mark an order as Delivered
Once a Purchase Order is created it would be great if there was a feature to allow you to mark the PO as delivered. Currently there is no way to see what ones are complete and what ones are still outstanding. This may need to be extended to allow individual line items on a PO to be able to be marked as delivered.

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James Wilson commented
Purchase Orders presently have 4 status: Draft, Awaiting Approval, Approved and Billed. This is an accounting perspective, but not a business perspective. Invoices have "Mark as Sent" which makes perfect sense for Purchase Orders too. The workflow is that there is a lead time so reporting 'Delivery Overdue' based on the "Delivery Date" would be useful - buyers then know which suppliers to chase. And closing a purchase order depends presently on it being invoiced. That's not a reflection of the real world. Delivery may be awaited, partially complete or complete. This is orthogonal to whether it is not invoiced, partially invoiced or fully invoiced. I'm sure different organisations may want different workflows, so across Quotations, Invoices, Bills and Purchase Orders, a useful feature would be to have 'User Status" which is configurable in Organisation Settings. Basic users can ignore this, but users who wish to model workflows more effectively could set up User Status fields and manually set this to stemp through a business process. For Purchase Orders we would set "Order Not Placed", "Delivery Awaited", "Delivery Partial", "Quality Issue", "Delivery Complete", "Closed". The Tabbed view (Draft, Awaiting Approval, Approved and Billed) should have a filter according to User status, so that the view becomes "Approved AND Deliver Awaited".
In summary a configurable USER STATUS for all documents configurable in Organisation Settings and acting as a filter to all views would be really useful.