Inbound idoc for updating delivery date of purchase order

Hi All,

Our vendor sends a delivery file consisting of delivery date and quantity(could be partial) for line items of a purchase order.

I need to update the Purchase order line item with the delivery date and quantity sent from the Vendor. It should add a new confirmation line with custom confirmation category in the confirmation tab of the line item in the Purchase order.

Each time we get a delivery file we need to add a new confirmation line in the confirmation tab of the purchase order line item.

How can I get this working using inbound idoc processing? Which Idoc type should I use to solve my issue. Will ORDERSP work for my scenario?

Thank you,

Sonali.