Your PLM knows the design, your manufacturer knows the shop floor. The figure in between arrives too late.

How a DFM analysis runs

1. 1

   Hand over the layout

   ODB++, IPC-2581 or Gerber, or straight out of KiCad and Altium without leaving the editor. ODB++ and the native layout carry the layer stack, and it is read. A bare Gerber set does not carry it, and then base material, thickness and copper weight become assumptions. An assumed copper weight goes straight into the bare board price.

2. 2

   Rule violations with limit and location

   The layout runs against a catalogue of 20 manufacturing rules. Every finding names the limit that was exceeded and the coordinate on the board, not just a rule number.

3. 3

   What the violation triggers in the process

   A pitch that is too tight is not an error, it is a hand-placement station. A test point with no access is not an error, it is an in-circuit test that will not happen. Every finding says which production step changes because of it.

4. 4

   An alternative with its break-even

   For every finding that can be quantified, a named counter-proposal, what it costs and from which quantity it pays off. Where the measurement carries no reliable figure, the finding stands without a price instead of with an estimated one. At ten prototypes almost no change is worth it, at five thousand pieces almost every one is.

What a development team takes away

20

Manufacturing rules in the catalogue, each with a limit and a location

5

Layout formats read: ODB++, IPC-2581, Gerber, KiCad, Altium

3

Stages per finding: violation, process consequence, priced alternative

1

Handover for rule check, cost and supply risk together

What belongs next to it

DFM analysis is one step in a chain. These three pages describe what happens before and after it.

Frequently asked questions

What is a DFM analysis?

Design for manufacturing, that is, checking whether a design can be built at a reasonable effort. What gets checked are quantities that do not appear in the schematic: pitch and part clearances against what a placement machine sets reliably, drill diameters and annular rings against what the board house can hold, test points against reachability for the bed of nails, layer stack against the impedance requirement. The result is not a yes or a no but a list of places with a limit, an overshoot and a coordinate.

What does the analysis check that the DRC in my layout editor does not?

The DRC checks against the rules you entered in the project yourself, and it knows no factory. The DFM analysis checks against the limits of the equipment that will build the assembly: the smallest package the placement machine sets reliably, which feeder lanes are occupied, which test point the bed of nails can reach, whether the layer stack is available. A layout can be DRC-clean and still force an extra manual station.

How does design advisory differ from a plain DFM check?

A DFM check says whether something can be manufactured. Design advisory also says what it costs, how much CO2 it causes, whether it is compliant and how secure the supply is, against a specific machine park rather than a general rule set. The DFM check is included; the cost statement is the part a rule set alone cannot deliver.

Why is the carbon footprint a question for engineering rather than for the manufacturer?

Because the manufacturer can barely change it. It builds the assembly with the parts, the base material and the layer count that are in the layout; what it influences is the electricity its own machines draw. Everything else is fixed in the design: part selection, board area, layer stack, share of through-hole parts. That is why the product carbon footprint sits next to the design decision that causes it. The material share comes from the BOM, the manufacturing share from machine time times power draw times emission factor. The same BOM line carries the RoHS status and the REACH/SVHC declaration, so a CSRD reporting duty or a customer compliance enquiry is answered from the design instead of from a spreadsheet filled in afterwards.

What data does the analysis need from me?

The fabrication data, not the schematic. Geometry, placement coordinates and the BOM, in ODB++, IPC-2581 or Gerber. The most complete route is ODB++ and the native layout from KiCad or Altium: there the layer stack is in the data set, meaning sequence, base material, thickness and copper weight per layer, and it is read out. A bare Gerber set does not carry those figures, so they become assumptions, and an assumed copper weight goes straight into the bare board price.

From what quantity is a design change worth it?

That is the question the finding itself answers, and the answer varies a lot. A change costs once: layout work, a release cycle, possibly a new sample round. It saves per piece. At ten prototypes almost no change carries those one-off costs, at five thousand pieces almost every one does. That is why each counter-proposal names the quantity from which it pays off, not only the saving per piece.