sigma represents standard deviation. In a normal distribution, +/- 1 sigma from the mean, for instance, corresponds to approximately 67% of the area under the normal distribution. +/- 2 sigma corrresponds to 95% of the area and +/- 3 sigma from the mean corresponds to 99% of the area under a normal distribution. The area that is covered under +/- six sigma from the mean corresponds to nearly 100% -- that is, the part of the area NOT under that +/- 6 sigma is in the 10^-15 range or 1/1,000,000,000,000,000.
The six sigma name borrows from this to suggest that the method gives this degree of certainty: that in 999,999,999,999,999 in 1,000,000,000,000,000 cases the result will be predictable. It does nothing, however, to explain how an agricultural process management methodology applies to other fields.
If Six Sigma = 0.999999, then in percentage terms that would be 99.9999%.
3 Sigma is 66800 defects per million pieces 6 Sigma is 3-4 defects per million pieces You can check out the number of defective pieces per million & the % accuracy for all Sigma levels in the six sigma conversion chart in the related links section
Quantitative skills
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G-I- Joe Sigma 6 - 2005 Sigma 1-5 was released on: USA: 8 October 2005
there are 6 sigma bonds in a benzene ring Correction: There are 6 sigma carbon-carbon bonds...but there are also 6 carbon-hydrogen sigma bonds. Thus there are twelve sigma bonds in a benzene ring.
The toy that is most often linked to Sigma 6 is the "G.I Joe: A Real American Hero" action figure. Sigma 6 is a line of action figures made by the company, Hasbro.
If Six Sigma = 0.999999, then in percentage terms that would be 99.9999%.
Phenol has 6 sigma bonds and 1 pi bond.
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Aspartame contains 7 sigma bonds and 7 pi bonds.
G-I- Joe Sigma 6 - 2005 Race 1-6 was released on: USA: 15 October 2005
James is the founder of 6-Sigma from vysarpadi in 1989. Suriya Lakshmi is mainly responsible for the six sigma concept develpment across the globe.
Hasbro manufactured a series of military style figures called the Sigma 6 series. Included in this series was the figure G. I. Joe. The figures in the Sigma 6 series stood approximately 8" tall and were articulated.
In sulfuric acid (H2SO4), there are 2 sigma bonds between hydrogen and sulfur, and 2 sigma bonds between oxygen and sulfur. This totals to 4 sigma bonds.
G-I- Joe Sigma 6 - 2005 Invasion was released on: USA: 16 September 2006