The Purpose and Principles of Six Sigma

This lesson introduces Six Sigma as a disciplined approach to improving process performance by reducing variation, defects, delay, and rework. It explains why Six Sigma exists, what it is designed to accomplish, and how Green Belt practitioners use data, customer requirements, and structured problem solving to improve measurable outcomes.

Learners will distinguish Six Sigma from general improvement activity, connect its principles to business and customer value, and understand the mindset expected of a Green Belt: define the problem clearly, measure the process honestly, analyze causes carefully, improve based on evidence, and sustain gains through control.