So has the Six Sigma moment passed?

"I think it has," says Babson College management professor Tom Davenport. "Process management is a good thing. But I think it always has to be leavened a bit with a focus on innovation and [customer relationships]." The discipline was developed as a systematic way to improve quality, but the reason it caught fire was its effectiveness in cutting costs and improving profitability. That makes it a powerful tool—if those are a company's goals. But as innovation becomes the cause du jour, companies are increasingly confronting the side effects of a Six Sigma culture.