Control Phase Success Criteria for the DMAIC Improvement Process

June 08th, 2013

Tags: Control Phase DMAIC, DMAIC, Six Sigma Control Phase, Six Sigma, Lean Six Sigma

The DMAIC Improvement Process of Lean Six Sigma comprises five phases namely, Define, Measure, Analyze, Improve, and Control. The Control Phase is where solutions are fully implemented and controls are installed to assure the solved problems stay solved. Ongoing process monitoring is implemented so that if anything adverse takes place the known corrective actions can be quickly administered. Documentation and training are completed to assure maintaining of the gains from the implemented improvements.  This article outlines the Control Phase Objectives, the Tools to Apply, and the Deliverables to be achieved.


  • Implement the Solutions on a full scale basis
  • Develop the Documentation to Execute the Improved Process
    • Policies, Procedures, and Work Instructions
    • Detailed Future State Process Maps
    • Training for Process Participants
  • Monitor the Process assuring that Project Goals are being met by the Implemented Improvements
  • Develop Quality Control Plans to Maintain the Gains
  • Develop Steps for Corrective Action including Roles and Responsibilities for Process Participants
  • Ensure that the Problem already Solved, Stays Solved!

Tools to Use:

  • Process Control Charts
  • Data Collection and Sampling Plans
  • Detailed Future State Process Maps with Execution Instructions
  • Analyses that compare the Before and After Results
    • Use the Baseline from the Measure Phase to compare with New Process Performance
  • Quality Control Plan
    • Process Map showing data collection sites
    • Ongoing data collection and sampling plan
    • Corrective Action Steps
    • Process Participant Roles and Responsibilities
  • Standardized Policies, Procedures, and Work Instructions to execute the Improved Process

Deliverables that Signify Phase Completion:

  • Completed Policies, Procedures, and Work Instructions to Execute the Improved Process
  • Comparison of Baseline Process Performance to Improved Process Performance
  • Validation of Project Goal Attainment
  • Completed Quality Control Plan with Corrective Actions to Maintain the Gains
  • Data Collection and Monitoring Capability Owned by the Process
  • Lessons Learned from the Improvement Project and Recommendations for Future Projects
    • Lessons Learned:
      • List what went well.
      • List what could have been done better.
    • Recommendations:
      • Create a list of additional improvements to make within this process.
      • Create a list of other processes where improvements can be made.
      • Create a list of other processes where these solutions can be applied.
      • What should this Improvement Team work on Next?
    • Celebrate: Rewards, and Recognition for a Job Well Done

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