A point which is outside of the lower control limit on an R-chart:
A)is an indication that no process variation is present.
B)should be ignored because it signifies very low process variation.
C)should be investigated because it could indicate improvements in the methods used in a process.
D)should be ignored unless another point is outside that limit.
E)is impossible because the lower limit is always zero.

Question

Quizplus · Accepted Answer

A point outside of the lower control limit on an R-chart indicates that the process variation is higher than expected or desired. This means that the methods and processes used in the production should be investigated for potential improvements. Therefore, it is important to investigate such a point instead of ignoring or assuming no process variation.

A Point Which Is Outside of the Lower Control Limit