Struct WesternElectricRules 

pub struct WesternElectricRules;

Western Electric rules (4 rules).

A subset of Nelson’s rules, these are the original run tests from the Western Electric Statistical Quality Control Handbook (1956):

1. Any point beyond 3 sigma (Nelson Rule 1)
2. 2 of 3 consecutive points beyond 2 sigma, same side (Nelson Rule 5)
3. 4 of 5 consecutive points beyond 1 sigma, same side (Nelson Rule 6)
4. 9 consecutive points on the same side of center line (Nelson Rule 2)

Trait Implementations

impl RunRule for WesternElectricRules

fn check( &self, points: &[ChartPoint], limits: &ControlLimits, ) -> Vec<(usize, ViolationType)>

Apply the 4 Western Electric run rules.

These correspond to Nelson Rules 1, 2, 5, and 6.