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Six Sigma Calculator

A free Six Sigma e-book by Geoff Tennant

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	Six Sigma Calculator How the process sigma metric is defined, and how to convert from process sigma to Defects Per Million Opportunities (DPMO) Free demonstrator e-book
The six sigma metric is a measure of process performance, often used at a high level to gauge performance and aid management decisions. Formally a measure of how many standard deviations fit between the average and the nearest customer or specification limit, in practical use many prefer to use DPMO or Defects Per Million Opportunities. The formal approach is based on the area of the tails of a normal distribution, falling outside of the customer limits, and the more practical DPMO is based around counting defects and opportunities, both of which can be difficult to define! The cumulative area under the normal distribution is indeterminate and therefore has no direct formulae for converting between sigma and area, so we often use tables or approximate formulae. To convert between process sigma and DPMO requires such a formula, as well as an understanding of the use of the 1.5 sigma shift. This demonstrator e-book has the standard conversion tables so that you can look up the DPMO and sigma values. It also has a working calculator, and a full discussion of the practical and theoretical issues surrounding the sigma metric and its use. Since every Six Sigma practitioner will need to convert between DPMO and process sigma, this e-book is a great tool to have on your laptop or desktop computer. And best of all its FREE! You can download Six Sigma Calculator and try it out for yourself at no charge.
To obtain your free copy now	Click to download (or right click on the link) and save the e-book file SigCalc.exe to your computer (427k). Review the e-book to ensure that it works for you: just double click on the file to open the book!
Try Six Sigma Calculator for yourself - it will cost you nothing but a moment of your time to download and start reading this e-book. If you don't have a need for it you can easily pass the file on to someone else who might benefit.
June 2003 © Geoff Tennant

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