The Essence of Six Sigma
This section introduces the core concept of Six Sigma. It is a disciplined, data-driven approach for eliminating defects in any process. Explore the cards below to understand its definition and broader societal impact.
A Data-Driven Methodology
Six Sigma is a method that provides organizations tools to improve the capability of their business processes. This increase in performance and decrease in process variation helps lead to defect reduction and improvement in profits, employee morale, and quality of products or services.
Societal Impact
Beyond corporate boardrooms, Six Sigma has led to more reliable products and services, particularly in manufacturing and engineering. Socially, it has reinforced a culture of quantification and data-driven decision-making in many aspects of modern life, emphasizing efficiency and measurable improvement.
The DMAIC Framework
The heart of Six Sigma is the DMAIC process, a systematic five-phase approach to problem-solving and process improvement. Interact with the diagram below to learn about each phase. Click on a letter to see its description.
Select a Phase
Click a button on the circular diagram to learn more about that phase of the DMAIC process.
Philosophical Roots
Six Sigma’s focus on empirical data and mathematical reality is not a new idea. It echoes principles from both ancient and modern philosophy. Click on the cards below to uncover these profound connections.
Ancient Philosophy
Pythagoreanism
Core Tenet:
The ancient Pythagoreans believed that reality itself was fundamentally mathematical. They saw numbers and ratios as the building blocks of the universe, governing everything from music to the cosmos.
Connection to Six Sigma:
Six Sigma’s core principle—that every process can be measured, analyzed, and improved through statistical methods—directly reflects this belief in the power of numbers to understand and control the world.
Modern Philosophy
Positivism
Core Tenet:
Championed by Auguste Comte, this philosophical stance asserts that authentic knowledge can only be gained through empirical observation and quantitative analysis. If it can’t be measured, it can’t be truly known.
Connection to Six Sigma:
Six Sigma is a corporate embodiment of positivist principles. It rejects intuition-based decisions in favor of a rigorous, evidence-based approach where every claim is backed by verifiable data.