Six Sigma is a data-driven approach used in project management and quality improvement that seeks to minimize defects and improve processes. Professionals at different levels of Six Sigma expertise are designated by belt colors, with Yellow Belts typically representing an introductory level. Six Sigma Yellow Belts are equipped with the basic tools of the Six Sigma methodology, enabling them to support project teams in quality improvement initiatives.

1. Cause and Effect Diagrams

2. The 5 Whys Technique

3. Flowcharts