SAP PS Project Systems Purchase requisition process

Hi Experts,

Topic: PS-MM Integration (purchase requisition process)

Problem: Let's say we have a project A and there is a component B which is non-stock item and material # does not exist. The project team member responsible creates an external activity within the project builder for component B to notify purchasing team that they require a quote from the vendor for sales order quotation. The problem is when the doc type NB is chosen in the project builder, the purchasing team assumes that this document type is used for converting the purchase requisition to vendor order and issues a PO after receiving the vendor quote info/creation of info record. Please note that, an info record does not exist because it is a non-stock item.

Please elaborate what is the process or which document type needs to be selected to let the purchasing team know through the project builder that this project A just needs a quote from the vendor for component B at this point of time and to avoid issuing a purchase order.

Version: SAP ECC 6.0 Eph 7