What is six sigma?
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In its essense, it is the application of the Scientific Method to business processes. A big factor is defined called a "big Y"... for example, Cost of Poor Quality (COPQ)... then the big Y is brokend down into little y's..for example, a little y of COPQ may be Rework... then you look for all of the significant causes of the little y, which are the x's. Then a project is created which figures out how y=f(x) and what steps in the process can be removed, added, or changed to improve the output you are trying to optimize. There are various methodologies of projects, like DMAIC, DMADDD, and DMADV. Six sigma can also be applied to the creation of processes, which is DFSS (Design For Six Sigma). Look at www.isixsigma.com for more info, or buy one of the many books out of the subject... Pyzdek is a good author, for example.
Six Sigma was pioneered by Bill Smith at Motorola in 1986. Originally, it was defined as a metric for measuring defects and improving quality; and a methodology to reduce defect levels below 3.4 Defects Per (one) Million Opportunities (DPMO).
try this site http://www.isixsigma.com/sixsigma/six_si... it may explain what others may not explain fully. have fun.
Six Sigma at many organizations simply means a measure of quality that strives for near perfection. Six Sigma is a disciplined, data-driven approach and methodology for eliminating defects (driving towards six standard deviations between the mean and the nearest specification limit) in any process -- from manufacturing to transactional and from product to service.
The statistical representation of Six Sigma describes quantitatively how a process is performing. To achieve Six Sigma, a process must not produce more than 3.4 defects per million opportunities. A Six Sigma defect is defined as anything outside of customer specifications. A Six Sigma opportunity is then the total quantity of chances for a defect. Process sigma can easily be calculated using a Six Sigma calculator.
isnt it like a quality assurance thing?
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