Six Sigma Origins: From Motorola to Global Methodology

The roots of Six Sigma as a measurement standard go back to Carl Frederick Gauss (1777-1855) who introduced the concept of the normal curve—the foundation of modern statistical analysis.

Six Sigma as a standard for measuring product variation dates back to the 1920s when Walter Shewhart showed that a measurement beyond ±3 sigmas (standard deviations) around the mean corresponds to an out-of-control point where a process needs correction. Many measurement standards (Cpk, Zero Defects, etc.) have appeared since, but the credit for coining the term "Six Sigma" goes to a Motorola engineer named Bill Smith.

In the late 1970s, Dr. Mikel Harry, a senior engineer at Motorola's Government Electronics Group (GEG), began experimenting with problem-solving through statistical analysis. Using his methodology, GEG products were designed and manufactured faster and at lower cost.

Dr. Harry's work culminated in a paper titled "The Strategic Vision to Accelerate Six Sigma at Motorola." He was appointed head of the Motorola Six Sigma Research Institute and became the driving force behind the methodology.

In the early to mid-1980s, under President Bob Galvin's leadership, Motorola engineers decided that traditional quality levels—measuring defects per thousand opportunities—didn't provide sufficient granularity. Instead, they wanted to measure defects per million opportunities.

Motorola developed this new standard and created the necessary methodology and cultural changes. The results were stunning.

Dr. Mikel Harry and Richard Schroeder, a former Motorola executive, transformed Six Sigma from a simple quality measurement tool into a revolutionary operational excellence philosophy. They created a unique combination of change management and data-driven methodology.

They had the charisma and ability to engage business leaders such as Bob Galvin of Motorola, Larry Bossidy of AlliedSignal (now Honeywell), and Jack Welch of General Electric.

According to Six Sigma folklore, Larry and Jack were playing golf one day when Jack bet Larry he could implement Six Sigma faster and with better results at GE than Larry could at AlliedSignal. Both companies went on to document billions in savings—the results speak for themselves.

Together, Harry and Schroeder took Six Sigma from the workshop to the boardroom with their innovative ideas about breakthrough strategy, sigma levels, and deployment roles: Green Belts, Black Belts, Master Black Belts, and Champions.

They created a business revolution that continues to challenge the thinking of leaders and employees. Their strategies and tools have been refined by the Six Sigma Academy, whose contribution has been the unique combination of business leadership with quality and process improvement tools.

Understanding Six Sigma's roots reveals why it endures as the world's leading process improvement methodology:

The discipline that started with Bill Smith measuring defects per million now powers DMAIC Suite™'s AI Master Black Belt Assistant, AI generated deliverables and analysis, real-time dashboards, and 50+ statistical tools—making professional-grade Lean Six Sigma accessible to organizations of all sizes.

Additional Resources