DFM Checklist

Determine the breakeven point for your tooling investment and compare your cost savings at different volumes.

DFM Checklist Categories

  • Are wall thicknesses consistent where possible?
  • Are draft angles included for molded parts?
  • Are sharp corners replaced with appropriate radii?
  • Are ribs, bosses, and features sized for manufacturability?
  • Are undercuts avoided or justified?
  • Is the parting line clean and practical?
  • Can the part be molded without expensive slides or lifters?
  • Are ejector pin locations acceptable cosmetically and functionally?
  • Is gate location appropriate for flow, strength, and appearance?
  • Can tooling complexity be reduced?
  • Does the material meet strength and durability requirements?
  • Is the material readily available from suppliers?
  • Does the material support the desired finish and texture?
  • Are shrinkage and tolerance expectations realistic?
  • Is there a lower-cost material that still meets performance needs?
  • Can the part be assembled easily and repeatedly?
  • Are fastener types minimized?
  • Are tolerance stackups reviewed?
  • Can components only be assembled the correct way?
  • Can the product be serviced if needed?
  • Can the number of parts be reduced?
  • Can material usage be reduced without affecting performance?
  • Are there unnecessary secondary operations?
  • Can cycle time be improved?
  • Are there opportunities for standard components?

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How to use a DFM checklist

Review design-for-manufacturing risks before you commit to tooling or production. Check geometry, wall thickness, draft, parting lines, material selection, tolerance stackups, assembly sequence, secondary operations, and the cost impact of each decision.

When should DFM happen?

DFM is most valuable before final tooling, but it should begin during product engineering and continue through prototype, quote, pilot build, and production release. Early changes are usually easier and less expensive than tooling changes after a supplier has started cutting steel.