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DFA

What is DFA? Design for Assembly

DFA focuses on how easy a product is to put together. Fewer parts and fewer steps mean cheaper, more reliable assembly.

July 21, 2026 4 min read
What is DFA? Design for Assembly

Design for Assembly (DFA) focuses on how easy a product is to put together. The fewer parts and the fewer steps, the cheaper and more reliable the assembly.

The two levers

  • Reduce part count — combine parts that do not need to move relative to each other
  • Reduce assembly operations — use snap-fits, self-locating features, one-direction assembly

DFA's biggest wins usually come from eliminating fasteners. Every screw is a part, a tool, a step, and a chance to fail.

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DFA in Practice: Reduce Part Count

The simplest DFA question: does this part need to be a separate part? If not, make it part of something else.