Invoicing in PurchaseOrders

Hi,

I wondered if anybody had a solution to an issue we have been trying to address regarding PurchaseOrders.

When you place a purchase order it goes for approval, and once approved awaits delivery.

With 90% of orders we recieve the stock next day and then can mark the items as received/delivered. At this stage within SD this closes the order completely. In our business we will not close an order until we have recieved the invoice and made payment.

Is it possible to have an extra stage where once the items are delivered we could have an awaiting invoice and then an awaiting payment option, these sections could be closed once you receive the invoice and then once you have paid for the items.

The process would ideally work as follows

Create Order, Approve Order, Awaiting Delivery, Receive Delivery, Awaiting Invoice, Receive Invoice, Payment Due, Payment Made, Order Closed.

Any advice/help would be great.

Many Thanks

George