VMI in Navision

sowj

hi everyone:
the characteristic of VMI (vendor managed inventory) business is the invoice is only meaningful when the company use the material. eg: we place a order of material A to vendor X, the quantity is 1000, and we got the receipt of 1000, this 1000 is not the stock of us.So we don't have the invoice until the workshop put this material (maybe a total in the end of every month) into production. so. actually, the invoice is based on the material consumption. also, the stock of this material may also include vendor B's supply, while vendor B is not applicalbe to the VMI situation but follows the standard purchasing process. Could any one offer the solution to the real stock and invoice confilict. thanks.