Sigma Level
Six Sigma
Sigma Level
Expression of process performance in standard deviations between the process mean and the nearest specification limit.
Examples
- 01The invoicing process runs at a sigma level of 3.8, about 10,700 errors per million opportunities.
- 02During Measure, the Green Belt calculates the sigma level of each error type, which shows that wrong VAT codes have the lowest score.
- 03The final tollgate review documents the sigma level rising from 3.8 to 4.6, which means errors fell from about 10,700 to 1,350 per million opportunities.