In my experience with suppliers, they are always open to providing suggestions for process monitoring, potential avenues of future risk, and additional cleaning steps to ensure the safety of the product. This can come in handy with risk management because not only would they have seen how your product of design is being manufactured, they would also see how others do things as well. That insight could prove to be valuable, especially from a supplier perspective if it results in additional money coming in. Customer surveys and routine checkups can prove to be valuable as well. They can disclose any issues they are experiencing which can be incorporated into the next iteration of a design.