A design that works as a prototype doesn't always survive contact with a factory. DFM review catches tooling, tolerance, and cost problems before they turn into expensive surprises mid-production.
Overview
A part that prints fine on an FDM printer or machines fine as a one-off prototype can still be a nightmare — or flatly impossible — to produce at volume. Undercuts that can't release from a mold. Wall thickness that causes sink marks or warping. Tolerance stacks that ignore real process capability. Features that are needlessly expensive to machine or mold when a small geometry change would cut cost significantly.
This is usually the point where people reach out: a manufacturer says the design "won't work" without much explanation, a supplier goes quiet after reviewing the file, or a quote comes back far higher than expected for reasons that aren't obvious from the CAD alone.
DFM review means auditing the design against the realities of your actual manufacturing process — not generic advice, but specific, actionable fixes tied to the process and volume you're targeting.
How It Works
Review the CAD against the target manufacturing process for red-flag features — undercuts, thin walls, aggressive tolerances, and more.
Rank every finding by manufacturing risk and cost impact, separating must-fix problems from nice-to-have optimizations.
Modify geometry, wall thickness, draft angles, and tolerances to match what your process can actually produce reliably.
Deliver an updated model plus a DFM report your manufacturer can review and approve against, no back-and-forth.
What You Get
Itemized list of manufacturability issues found, with severity ranking and a recommended fix for each.
Redesigned geometry that addresses every flagged issue, ready for re-quoting or tooling.
Verification that your toleranced dimensions actually achieve fit and function at production scale.
Drawings and notes formatted so your factory or supplier can quote and approve without further back-and-forth.
FAQ
Yes — this is one of the most common reasons people reach out. I'll review the design against the actual process your manufacturer uses and identify exactly which features are the problem, then fix them.
No — DFM principles apply to CNC machining, sheet metal, casting, and 3D printing too. Each process has its own manufacturability rules, and the review is tailored to whichever process your part is going through.
Not necessarily, though it helps if you can share their specific feedback or process specs. I can also work independently from general best practices for your target process and volume.
Yes — a lot of DFM work is really cost engineering: simplifying features, reducing material usage, and eliminating unnecessary secondary operations, on top of making the part moldable or machinable at all.
It depends on the part count, complexity, and target process. Send the CAD and you'll get a flat quote upfront — most single-part reviews are a small fraction of the tooling cost they protect you from getting wrong.