I discovered a different approach on Six Sigma: DMADV, that could be compared to the classic DMAIC.

DMAIC           |    DMADV
Define             |    Define
Measure         |    Measure
Analyze          |     Analyze
Improve        |     Design
Control           |     Verify

We should use DMADV methodology when a product or process is not in existence at the organization and one needs to be developed.

Other situation is when the existing product or process exists and has been optimized (using either DMAIC or not) and still does not meet the level of customer specification or Six Sigma level.

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