Design for Manufacture and Assembly

Design for Manufacture and Assembly (DFMA) is a set of techniques for design or redesign a product with the objective of improve the manufacturability, assemblability and costs, respecting the essential functions of the product. It could be divided in two parts Design for Manufacture and Design for Assembly.

That set of techniques was introduced in 1980 by Geoffrey Boothroyd and Peter Dewhurst, two teachers of engineering from Rhode Island University. Both created a company called Boothroyd Dewhurst Inc. that continues developing the DFMA nowadays and have the possession of the trademark DFMA.

DFMA produce a lower degree of rentability than the innovation but the risk of the application is lower in comparison with the risk that produces the innovation. The principal uses of that technique are the following:

  • Analyze the management chain of cost.
  • Simplify the products and improve the quality.
  • Improve the communication between the departments of design.
  • Decrease the manufacturing and assembly costs.

The next image is a good example of the application of DFMA where Texas Instruments  achieved an improvement of 80% in the efficiency of the design for a M1 tank electronic box. In that operation of redesign they achieved reduce the number of components and fasteners and the volume and weight.


Figure 1: Example of DFMA


Potential uses of that methods do not end in the design and redesign of products it can be applied to other sectors like building construction or automotive sector. In the next video is possible to view the construction of an hospital in Sidney by Laing O’Rourke, an international engineering company, and how the company applied the DFMA method to improve the construction of the hospital.


Links of interest:

Click to access fichero_15_4333.pdf

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