Six Sigma
Sigma levels
Columns: Sigma level | Sigma (with 1.5σ shift) | DPMO | Percent defective | Percentage yield | Short-term C pk | Long-term C pk
1 | -0.5 | 691,462 | 69% | 31% | 0.33 | –0.17 | 2 | 0.5 | 308,538 | 31% | 69% | 0.67 | 0.17 | 3 | 1.5 | 66,807 | 6.7% | 93.3% | 1.00 | 0.5 | 4 | 2.5 | 6,210 | 0.62% | 99.38% | 1.33 | 0.83 | 5 | 3.5 | 233 | 0.023% | 99.977% | 1.67 | 1.17 | 6 | 4.5 | 3.4 | 0.00034% | 99.99966% | 2.00 | 1.5