What is the core aim of the control method in Six Sigma?

The core aim of the control method in Six Sigma is to control processes cost-effectively after implementing changes. This phase is crucial for sustaining improvements and ensuring that the gains achieved during the earlier stages of the Six Sigma methodology—specifically, define, measure, analyze, and improve—are maintained over time. By focusing on effective control, organizations can monitor the performance of their processes to ensure they remain stable and predictable, minimizing variation and preventing the reoccurrence of defects.

After implementing improvements, it is essential to establish controls that allow for ongoing monitoring and timely corrective actions if necessary. This ensures that the changes lead to lasting benefits and that processes continue to operate within desired specifications, thus enhancing quality and efficiency in the long run. The emphasis on cost-effectiveness further aligns with the overall Six Sigma goal of maximizing quality while minimizing costs.