Six Sigma DMAIC Process - Analyze Phase - Control Impact Matrix

This is a prioritization tool that is used in conjunction with the C&E tool typically after the causes have been captured using C&E. Prioritization is done based on factors (causes) that are in your control and the impact (extent) of the factor on the problem or the effect.

Six Sigma Control Impact Matrix

We generate the factors/causes using the C&E (Cause and Effect) matrix. Followed by verification of this qualitative assessment of the factors/causes by seeking data, which can then be prioritized using the control impact matrix or Pareto analysis. But are these the root causes? Or do we need to drill down further?

How do we do it?
Ask Why five times OR Ask why till a time when you do not have an answer to the Why OR The final answer that you may get could be a root cause.

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