GE adopted Six Sigma from Motorola in 1995, and under Jack Welch it became corporate religion. But as GE began a long, slow decline, so did the popularity of Six Sigma. Once synonymous with management excellence, GE’s reputation in the business world plummeted in concert with its share price. As GE’s fortunes diminished, so has interest in Six Sigma. So how relevant is the skill of Six Sigma in the world of continuous improvement – today?