A useful design-for-manufacturing review connects each feature to how the part will be made, assembled and checked. Before asking for a quote, mark the dimensions and surfaces that control function. That lets the manufacturer tell you which design changes could simplify production without compromising the assembly.
Start with the function of the part
List what the part touches, locates or protects. Note its loads, operating environment and visible faces. For an enclosure, connector openings and board mounting locations may be critical, while an internal stiffening feature might have room for adjustment.
Review the features that drive setup and tooling
Look for features that require access from several directions, very deep cuts, holes close to a sheet metal bend, or thick transitions on a molded part. Ask whether a larger corner radius, a moved hole or a more uniform wall would serve the same purpose. Check the proposed change against the mating part before revising the model.
Prepare a quote package with clear priorities
Send the current CAD file and a drawing with matching revision identifiers. Include quantity, material or acceptable alternatives, finish requirements and the features that need inspection. Separate fixed requirements from choices the manufacturer can propose. Ask which assumptions affect unit price, tooling or lead time so quotes can be compared on the same scope.
Explore the engineering support and DFM review and CNC machining design guide.
