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SAB7#82 SIGMA
- Is another name for standard deviation and indicates how much variance from
the mean has been established as permissible in a process.
- The level of quality a company has decided to try to achieve is represented by 3 or 6 sigma.
Nota:
- Six Sigma is a methodology for organizational process improvement and achieving high levels of correctness with extremely reduced variances.
- 1 Sigma: 68.27% = 308.500 defects in 1 million
- 2 Sigma: 95.45% = 66.800 defects in 1 million
- 3 Sigma: 99.73% = 2.700 defects in 1 million
- 4 Sigma: 99.9937% = 233 defects in 1 million
- 5 Sigma: 99.999943% = 6,210 defects in 1 million
- 6 Sigma: 99.9999998% = 3 o 4 defects in 1 million
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