Companies need line level attachments and attachments to Lots/serial numbers (information card), especially on the purchase receipt side. When items are received many times there is an inspection report from the vendor or a certificate of conformance that needs to be attached to the line on the purchase order / warehouse receipt / purchase receipt. This document may also be lot or serial number specific and ideally would be attached to the information card.
This is also seen on the sales side where a company may have a certificate of conformance or a quality document or documents that are item specific and would be attached to the sales line and related document lines (shipment/invoice, etc.).
Not having this is a major impediment to traceability and being able to produce proper quality certificates for products purchased or manufactured and sold