Purchase order tracking

Two ideas that would really help us to manage our purchase orders - we use them for most of our major purchases and tracking them can be a bit of a pain right now.

Currently we use draft for building up POs, when we issue them they stay in draft until we receive an invoice, when we receive that invoice we mark the PO as complete.

We have a lot of POs in draft that haven't been issued yet as we are working out the detail of exactly what we need to order. We have no way of filtering them against those that have been issued to understand how much money we are currently committed to spending that isn't yet invoiced. We also regularly get partial invoices against a PO and have no way of knowing this/tracking.

It would be very useful to be able to

1. mark a PO as having been Issued. I.e. the process flow would become: Draft -> Issued -> Complete (when invoiced).
2. have the value of Invoiced or Outstanding amounts against each PO in the list (i.e. PO value vs Total Invoices raised against the PO).

Thanks,

James