What is the ultimate purpose of the 'Control' phase in DMAIC?

The ultimate purpose of the 'Control' phase in DMAIC is primarily focused on monitoring performance to sustain improvements. This phase ensures that the gains achieved during the improvement phases of DMAIC are maintained over time. By establishing control systems and monitoring processes, organizations can ensure that any deviations from the desired performance levels are identified and addressed promptly. It emphasizes the importance of continual measurement and feedback to confirm that improvements are not only achieved but also sustained in the long run. This ongoing vigilance helps in solidifying the framework for process excellence and ensures that the improvements made during the earlier phases are endured as part of the organization's standard practices.