In Six Sigma, what does the term 'Control' refer to?

In Six Sigma, the term 'Control' refers to maintaining improvements over time. This is a critical component of the DMAIC (Define, Measure, Analyze, Improve, Control) methodology, which is used to improve processes and eliminate defects. Once improvements have been made during the Improve phase, it's essential to ensure that these gains are sustained. The Control phase involves establishing standard operating procedures, implementing control plans, and utilizing monitoring systems to keep the process in the desired state and prevent regression to past performance levels.

Achieving lasting change requires ongoing efforts to monitor the processes and make adjustments as needed. This proactive approach helps organizations maintain quality and continue benefiting from the improvements achieved through the project, ensuring that the intended outcomes of Six Sigma initiatives are realized consistently over time.