Which phase of Six Sigma determines baseline process capability?

The Control phase is implemented after improvements have been made and focuses on maintaining the gains achieved during the Improve phase. It ensures that the process remains stable and continues to perform at the desired level. However, it does not involve establishing baseline capability, as this is already determined in the Measure phase.

The Define phase is the initial step in the Six Sigma methodology, where the project goals, scope, and customer requirements are established. While it sets the stage for the project, it does not involve measuring current process capabilities or performance metrics, which are essential for understanding baseline capabilities.

The Improve phase comes after the Measure phase, where solutions are developed and tested to address the problems identified in the process. This phase is focused on improving the process performance rather than establishing a baseline. Therefore, it does not determine baseline process capability, which is established beforehand.