Design for manufacturing is usually treated as a gate near the end of engineering. Treated that way, it catches the cheap problems and misses the expensive ones. Done early, DFM is a bill-of-materials activity as much as a geometry one.
Most teams picture DFM as a check on draft angles and wall thickness. That part matters, but the larger savings are in the bill of materials itself: how many unique part numbers it carries, how many of them are single-sourced, and how many exist only because two sub-teams chose different parts for the same job.
The first pass we make on any design is consolidation. A BOM with 14 distinct resistor values and four connector families is not wrong, but it is more expensive to buy, stock, place and inspect than it needs to be. Fewer line items means lower placement cost, fewer reels, fewer chances for a shortage to stop the line.
On the mechanical side, the recurring offenders are uniform wall thickness, draft, and undercuts. Thick-to-thin transitions sink and warp; missing draft fights ejection; undercuts force side actions that turn a simple single-cavity tool into a slower, costlier one. Catching these in CAD costs an afternoon. Catching them in steel costs weeks.
On the electronics, package choice sets your assembly reality. An 0201 passive saves board area but narrows your supplier and rework options versus an 0402; a fine-pitch BGA may demand a better stack-up and X-ray at inspection. We choose packages with the line that will build them in mind, lay out for panelisation, and keep hand-soldered exceptions to a deliberate minimum.
None of this is exotic. It is just done early, with the factory in the room — which is the whole point.
Send us your current CAD and BOM. We will tell you plainly where the cost and risk sit before you commit to tooling.
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