Six Sigma Six Sigma (6σ) is a set of techniques and tools for process improvement. It was introduced by American engineer Bill Smith while working at Motorola in 1986. Six Sigma strategies seek to improve manufacturing quality by identifying and removin ...

, the discrimination ratio or reliability design index is a performance metric of attribute agreement analysis which assesses the level of agreement between how well the appraisers or inspectors can differentiate between acceptable and unacceptable items.

References

Six Sigma Metrics Indicators Ratios Statistical reliability {{statistics-stub