Which of these patterns on a control chart would require a worker to stop the process and investigate for an assignable cause?
A)a run of five consecutive points below the center line
B)a run of three consecutive points all increasing
C)six consecutive points close to the center line
D)one point near the lower control limit

Question

Quizplus · Accepted Answer

A run of five consecutive points below the center line indicates a non-random pattern that could suggest a shift in the process mean, warranting investigation for an assignable cause.

Which of These Patterns on a Control Chart Would Require