Operational Excellence (OPEX) Insight – Thursday - May 28, 2026: 25 Years In, 82% of Fortune 500 Still Run on Lean Six Sigma, Now With AI.
Góc Nhìn Vận Hành Xuất Sắc – Thứ Năm, Ngày 28/05/2026: 25 Năm Qua, 82% Fortune 500 Vẫn Vận Hành Bằng Lean Six Sigma, Giờ Có Thêm AI.
Welcome To Operational Excellence (OPEX) Insight Article For The Paid Subscriber-Only Edition.
This is the bilingual post in English and Vietnamese. Vietnamese is below.
Đây là bài viết song ngữ Anh-Việt. Tiếng Việt ở bên dưới.
English
PART 1 – OFFICIAL INFORMATION
On February 23, 2026, at the Renaissance Phoenix Glendale Hotel in Arizona, more than a thousand process improvement professionals from around the world walked into a conference hall decorated with a large number 25 behind the stage. They came to celebrate a quarter century since ASQ (the American Society for Quality) first organized the Lean and Six Sigma Conference in the early 2000s, transforming a methodology born in semiconductor factories into a global movement with its own stage, its own community, and influence that extended far beyond the borders of manufacturing. This year’s theme was “Leaning into the Future”, a subtle play on words between “lean” (as in lean manufacturing) and “leaning” (tilting forward), accurately reflecting the question that everyone in the auditorium was asking themselves: in the age of artificial intelligence, Digital Twin, and automation, how long can this forty-year-old methodology stand firm, or is it entering the most powerful renaissance in its history?
To answer that question, one must go back forty years, to a place more than two thousand kilometers from Phoenix: Motorola’s factory in Schaumburg, Illinois. In 1986, Bill Smith, a senior engineer with more than thirty years of industry experience, presented to CEO Bob Galvin a study that made the entire leadership team pause and reflect. Smith discovered that products which underwent multiple repairs during production had significantly higher field failure rates compared to those that passed through the line without intervention. That finding sounds obvious today, but in the mid-1980s, the prevailing philosophy was “inspect quality at the end of the line”: if the final product met standards, the process that produced it did not matter. Smith completely overturned that thinking. He argued that quality must be built into the process, not inspected into the product, and the only way to achieve that was to reduce process variation to near zero: 3.4 defects per million opportunities. He called that target Six Sigma, named after the statistical symbol representing six standard deviations from the mean.
Together with Mikel Harry, an engineer later known as the principal architect of the methodology, Smith built a four-stage problem-solving framework: Measure, Analyze, Improve, Control, abbreviated as MAIC. This framework was not invented from nothing. It inherited and systematized the quality management principles that W. Edwards Deming, Joseph Juran, and Walter Shewhart had developed since the mid-twentieth century. But Smith and Harry’s contribution was transforming those scattered principles into a structured methodology that could be taught, deployed, and measured in dollars. Just two years after implementation, Motorola won the Malcolm Baldrige National Quality Award in 1988, the most prestigious presidential-level quality award in the United States. By 2005, Motorola announced that Six Sigma had helped the company save a cumulative total of more than $17 billion since inception.
But Six Sigma might have forever remained an internal Motorola program if not for Jack Welch. In 1995, the legendary CEO of General Electric decided to make Six Sigma the core business strategy of the entire corporation, not just in the manufacturing division but in every department, from finance to human resources, from sales to logistics. Welch added a Define stage at the beginning of MAIC to create the complete DMAIC framework known today, ensuring that every project began by clearly defining the problem to be solved and the voice of the customer. GE reported savings of $350 million in 1998 alone, a figure that later exceeded $1 billion per year and accumulated more than $12 billion over five years. More important than the numbers, Welch created an incentive system that no company before had dared to implement: he tied 40% of senior management bonuses to Six Sigma project results, and promotions were reserved only for those who had completed at least one project at the Green Belt level or above. Six Sigma was no longer optional. It was a condition of survival at GE.
Parallel to the statistical revolution in the West, across the Pacific, Toyota’s production system with its Lean philosophy developed by Taiichi Ohno and Shigeo Shingo since the 1950s had proven that eliminating waste and reducing variation were not two different battles but two sides of the same coin. Lean focused on speed and flow: eliminating seven types of waste (Muda), reducing cycle time, and continuously creating value for the customer. Six Sigma focused on precision and consistency: reducing variation, eliminating defects, and bringing every process into statistical control. In the early 2000s, pioneering companies recognized that combining the two approaches would create synergy greater than the sum of both parts, and the term Lean Six Sigma was born. According to a report by iSixSigma Magazine in 2007, Lean Six Sigma had helped Fortune 500 companies save an estimated $427 billion over twenty years, a figure that no other management methodology in history had ever achieved.
Bill Smith died in 1993 from a heart attack at work on the Motorola campus, just seven years after laying the foundation for the methodology that bore his name. He did not live long enough to see GE turn Six Sigma into a global standard, to see hospitals use DMAIC to reduce emergency room wait times, to see banks use Lean to optimize loan approval processes, or to see millions of people around the world call themselves Green Belts and Black Belts like martial arts rankings. But in February 2026, when more than a thousand people stood up in the auditorium in Phoenix to celebrate 25 years of the conference named after the methodology he created, Bill Smith’s legacy needed no introduction.
