What is Design for Manufacturing or DFM?

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Watch Industrial Design for Manufacturing and Assembly (DFMA)
Design for Manufacturing / Assembly (DFM/DFA)
What is Design for Manufacturing or DFM?
Design for Manufacturing (DFM) is the process of designing parts, components or products for ease of manufacturing with an end goal of making a better product at a lower cost. This is done by simplifying, optimizing and refining the product design. The acronym DFMA (Design for Manufacturing and Assembly) is sometimes used interchangeably with DFM.

Five principles are examined during a DFM. They are:
Process
Design
Material
Environment
Compliance/Testiing

Question every aspect of your design.

Look at the original drawings.
Tear down the product.
Look at competitive and near-neighbor products, as well as lead users such as medical and automotive.
Talk to your contract manufacturer — who may have solved the problem with a different customer?
Has someone else solved this problem a different way?
Is there a way to make it better?