Hardware planning
How to review design-for-manufacturing feedback
Review each DFM comment against the proposed process and your product's requirements. Record the affected feature, reason, design impact, and decision owner, then release one agreed revision for quoting and production.
Sources reviewed October 5, 2026. Checklists and examples are Hard Tech Directory editorial guidance.
Build your project brief →1. Confirm what was reviewed
Design for manufacturing, or DFM, asks whether and how a design can be made using a proposed process. A review is most useful when it names the files, material, quantity, and production method. It does not by itself establish product performance or complete all engineering checks.
- Record the CAD, drawing, and BOM revisions included in the review.
- Ask whether comments apply to prototype tooling, the proposed production process, or both.
- Distinguish a required manufacturing change from a suggestion to reduce cost or simplify work.
2. Assess the impact of each change
Ask the supplier to identify the feature and explain the reason for its suggestion. Protolabs discusses drawing callouts and machining tolerances; SendCutSend publishes bend constraints for its service. These are examples of process-specific guidance, not universal limits for all factories.
- Describe the original requirement: fit, load, sealing, assembly, appearance, or another function.
- Have the engineering owner assess changes to geometry, material, finish, and interfaces.
- Compare the proposed change with alternatives, including a different process or supplier.
- Record cost and schedule effects as quote information rather than assuming every change saves money.
3. Close the review and reissue the package
Keep a decision log that separates accepted changes, rejected suggestions, and open questions. Send revised files to all affected teams and ask the manufacturing partner to confirm that the new package resolves the review. A changed drawing and an unchanged model are an unresolved package.
- Assign an owner and next action for unresolved comments.
- Record whether fixtures, inspection, or downstream assemblies also need updating.
- Replace the quote baseline with the approved revision and request revised pricing where needed.
- Agree what evidence a pilot should provide before repeat production.
Example: an internal corner on a machined housing
Illustrative case: a supplier proposes a larger internal corner radius to use its preferred cutter. Check the mating component's clearance and assembly path before accepting. If the fit cannot change, ask about another operation or supplier and its quote impact. Record the decision and update the controlled files; a manufacturability suggestion does not authorize a functional compromise.
Decision checklist
- Reviewed files and process identified
- Every comment linked to a feature and reason
- Functional impact checked by the engineering owner
- Accepted changes reflected in all affected files
- Quote and pilot acceptance updated to the approved revision
Sources and next steps
Sources support the context described above. Provider documentation describes that provider's service; confirm the scope in your own quote.
- Protolabs: machining tolerances and drawing requirements
- SendCutSend: bending service and design constraints
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