Q: What happens if a Vendor only ships a partial order?

Answer

Vendors will inevitably ship partial orders.

Contact the vendor to determine the reason for the partial shipment and to determine next steps.

If the vendor cannot complete the purchase order, be sure that the invoice for the PO only charges MIT for the items/service actually received. 

If the partial shipment has been invoiced and paid, and no more activity is expected against the PO, close the PO.