The cost of a medical device does not begin on the production floor. Much of it is designed into the product long before the first unit is manufactured—through material, geometry, tolerances, surfaces, manufacturing processes, inspection methods and packaging. Each of these decisions determines how reliably, scalably and economically the product can later be industrialized and manufactured at scale.
A drawing defines more than geometry
When a CDMO partner is involved only after the drawing is essentially complete, many critical decisions have already been made. The partner receives a largely fixed specification, leaving little room to jointly optimize its technical logic and economic consequences.
What may look like a minor design detail can have a major impact in production: unnecessarily tight tolerances increase inspection effort and scrap; complex geometries reduce process capability; hard-to-source materials weaken supply security; and unsuitable inspection concepts make validation and transfer more difficult.
Design for Manufacturing starts before design freeze
Design for Manufacturing is not a review performed after development. It is part of development itself.
An experienced CDMO partner can ask the questions that matter before options disappear: Which tolerances are genuinely required for function? Is there a more reliable manufacturing process? Can the geometry be inspected more simply and reproducibly? Which features will drive scrap and cost? Which processes will be difficult to validate? Which materials will remain reliably available?
These questions do not challenge the clinical concept. They separate functional necessity from avoidable industrial complexity.
Early Supplier Involvement connects development and industrialization
This is where I see the value of Early Supplier Involvement, particularly in New Product Introduction projects. Not because the CDMO should assume the OEM's role, but so that its development, manufacturing and industrialization expertise can inform decisions in time.
This early exchange between OEM and CDMO reduces iteration loops, exposes risks sooner, strengthens the validation strategy and makes the subsequent transfer into full-scale production more predictable.
Timing is decisive. While material, geometry and process choices are still open, alternatives can be evaluated comparatively easily. After design freeze, every correction becomes a change—with additional coordination, evidence and time.
What defines a CDMO partnership
For me, the distinction between traditional contract manufacturing and a CDMO partnership becomes visible before the first production order.
Traditional contract manufacturing often starts with a largely completed drawing. A CDMO partner contributes development, process and manufacturing expertise before design freeze, helping turn the product concept into a production-ready solution.
Product responsibility remains with the OEM. The CDMO complements the OEM's development capabilities with process knowledge, inspection concepts, material expertise and a view of validation and scalability. Its value lies not only in executing a specification, but in improving the quality of decisions made before production begins.
The later manufacturability and industrialization are considered together, the more expensive it becomes to correct poor decisions.