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QFD and DFLS / DFSS

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(image - QFD vs DFSS / DFLS)In recent weeks, we have had several opportunities to work with DFLS/DFSS (design for lean/six sigma) black belts and master black belts.

We discovered something amazing: The focus of DFSS and DFLS is our internal products and processes, whereas the focus of QFD is our customers (especially, end users). One person suggested we rename QFD to DFCV (design for customer value).

Similarities

Both QFD and DFSS/DFLS want to improve product / service / software / process quality. How can we design and deliver more efficiently, more competitively, and create loyalty? Both look at how to develop solutions with high quality, low cost, and on-time. Both methods integrate other tools to improve the resulting products.

Differences

  Focus.

  Customers.

 VOC (Voice of Customer).

 Priority.

 Solutions.

 Design, Development, and Commercialization.

 Math.

How can we get the best of both worlds? (image DFSS + QFD = happy customer)

It's not an either-or question. QFD can be described as a holistic approach that links business, customer, and technology in one end-to-end trackable flow with the goal of customer value — DFCV (Design For Customer Value).

QFD uses quantitative and non-quantitative tools to analyze the unknown unknowns, information that leads to sustainable competitiveness.

DFSS/DFLS provides a powerful set of statistical and analytic tools that can improve the efficiencies and effectiveness during the build of new products. QFD provides the umbrella of customer value as the driver and DFSS/DFLS kicks in downstream to assure that solutions are optimally developed.

We need them both!

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