Invoice going on hold where the items are not received.

Summary:

The purchase order is getting invoiced before the shipment is received and going on hold. Once the receiving of all quantities is done, post that only the invoice is released from hold. For ex. if the purchase order and 5 quantities and 0 rececived ,the invoicing is done one for 2 quanties and 3 quantities in 2 seperate invoices if both of them go on hold. Now, if even if we receive 2 quantities, the invoice with 2 quantities billed does not get resolved from hold, until all 5 quantites of the purchase order are received. Any way how we can solve this?

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