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The Improve Phase is the fourth phase of the DMAIC process and focuses on identifying opportunities for improvement based on the discoveries uncovered in the data and the process in the Analyze Phase. Once potential solutions are identified, the are evaluated and selected for implementation. Risk assessment, piloting and verification that the changes had the desired impact take place prior to moving on to the Control Phase.


For a better understanding of the Improve Phase and an overview of Lean Six Sigma, check out our Free Lean Six Sigma Yellow Belt Training, Green Belt Training or Lean Training.

Elisabeth Swan

Elisabeth is a Managing Partner at, the co-author of The Problem-Solver’s Toolkit and co-host of the Just-in-Time Cafe. For over 25 years, she's helped leading organizations like Amazon, Charles Schwab and Starwood Hotels & Resorts build problem-solving muscles with Lean Six Sigma to achieve their goals.