I have no experience with this however, I can provide some insight. For the process of design transfer to be easier I believe status meetings should be done prior to the project being handed off to manufacturing or production. Manufacturing should be part of the planning phase if they aren’t already. The reason I state this is what happens if manufacturing cannot develop the device because there isn’t a technology that can support the production of this product. You have a great idea, but it cannot be produced. Anyways, as mentioned before having meetings regularly and communicating clear and concisely will help with the design transfer.