When the $\bar { x }$ control chart shows a slow and steady shift (up or down)in the process distribution mean,the result is referred to as:
A) a level shift.
B) a cycle.
C) a trend.
D) instability.

Question

Quizplus · Accepted Answer

A slow and steady shift in the process distribution mean is referred to as a trend. A level shift would be an abrupt change in the mean, while a cycle would show periodic variation in the process. Instability would indicate a highly unpredictable and unstable process.

When The xˉ\bar { x }xˉ Control Chart Shows a Slow and Steady Shift (Up or Slow

When The $\bar { x }$ Control Chart Shows a Slow and Steady Shift (Up or Slow