spc.controlviolation.nelson.1984.test1.outside.zone.a.lower: Control Violations - Nelson Rule 1 - Points Below Zone A

In burrm/lolcat: Miscellaneous Useful Functions

Control Violations - Nelson Rule 1 - Points Below Zone A

Description

Zone A (above and below the center line) typically corresponds with the upper and lower control limits for the chart. This rule identifies points below the lower Zone A limit. Points in chart.series that are below the lower control limit may indicate that a special cause of variability is present that is causing the process to dip lower than would be expected for a process exhibiting a state of control.

Usage

spc.controlviolation.nelson.1984.test1.outside.zone.a.lower(
  chart.series = NA,
  center.line = NA,
  control.limits.ucl = NA,
  zone.a.upper = NA,
  zone.ab.upper = NA,
  zone.bc.upper = NA,
  control.limits.lcl = NA,
  zone.a.lower = NA,
  zone.ab.lower = NA,
  zone.bc.lower = NA,
  ...
)

Arguments

chart.series	Vector - Chart series
center.line	Vector - Chart center line
control.limits.ucl	Vector - Chart upper control limit (UCL)
zone.a.upper	Vector - Chart Zone A boundary above center line.
zone.ab.upper	Vector - Chart boundary between Zone A and Zone B above center line.
zone.bc.upper	Vector - Chart boundary between Zone B and Zone C above center line.
control.limits.lcl	Vector - Chart lower control limit (LCL)
zone.a.lower	Vector - Chart Zone A boundary below center line.
zone.ab.lower	Vector - Chart boundary between Zone A and Zone B below center line.
zone.bc.lower	Vector - Chart boundary between Zone B and Zone C below center line.
...	Additional parameters

Value

Vector of logical values corresponding to whether points in chart.series violate this rule.

burrm/lolcat documentation built on Aug. 15, 2024, 6:16 p.m.