In the early 2000s, GE was the world’s most powerful company, and its CEO Jack Welch was a firm believer in the Six Sigma system for eliminating errors in manufacturing. With GE as its poster child, management consultants spread the gospel of Six Sigma to companies everywhere. Now, as GE’s fortunes diminished, so has interest in Six Sigma. But what made this system so special in the first place, and how much is still useful today?

Photo by Eric Helgas; styling by Alex Citrin-Safadi

Transcript: https://qz.com/2062943