In this Quartz membership conference call, finance editor Jason Karaian and deputy finance editor Oliver Staley discussed Oliver’s feature article about the rise and fall of Six Sigma, the management system popularized by General Electric and Jack Welch. Among other topics, they covered: The origins of Six Sigma in Japanese manufacturing Why it was embraced at GE, and how it spread What Six Sigma is good for, and what it isn’t Who is using Six Sigma today?