In the currently implemented supplier consignment inventory functionality, MRP does not raise the consignment inventory, instead it raises a record based on the default order settings (E.g. A planned PO). The default order settings do not have the option for the default order type of "Consignment inventory". The only current workaround is not specifying a default supplier, allowing the system to raise a planned PO and deleting / manually recreating it as a consignment replenishment order. This does not represent a streamlined process. If a consignment replenishment order already exists, MRP considers this as inbound supply, but automatic raising of a consignment replenishment order is not possible in the current functionality.