Praveen Gupta was at Motorola in 1987 when Bill Smith first proposed what has become Six Sigma, and has been working to improve processes ever since. Somewhere along the line Mr. Gupta became focused on the problems of relating corporate goals and profits to process changes. Mr. Gupta describes the history and practices of Six Sigma in a few succinct chapters. He goes on to compare and contrast Six Sigma measures with ISO 9000 measures and the measures used by the US’s Baldrige award system. In the end he concludes that, while each contributes to improved processes, they do not tend to establish clear links to corporate goals, and ultimately, to corporate profits. Or, put slightly differently, there is no way to conclude, from lots of specific Six Sigma projects, whether the organization, as a whole is getting better.

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