Sample proportions that are less than the lower control limit indicate a change in the process that we would like to make permanent.

Question

Quizplus · Accepted Answer

Sample proportions that fall outside of the control limits are considered to be out of control, indicating a change in the process that may be due to a special cause variation. This suggests that the process needs to be investigated to determine the cause of the variation and to make permanent improvements to the process.

Sample Proportions That Are Less Than the Lower Control Limit