Question

Which is better 1 Sigma or 6 Sigma?

Answer 1

– 1 Sigma: 68.27% of the process output meets customer requirements. – 3 Sigma: 99.73% of the process output meets customer requirements. – 4 Sigma: 99.9937% of the process output meets customer requirements. – 6 Sigma: 99.99966% of the process output meets customer requirements.