Education Technology

Drawing a Control Chart

Published on 08/01/2011

Activity Overview

To make sure product quality is as good as it states, a process is put in place to monitor quality by using statistical control charts. Measurements change over time. To monitor this change, we can use control charts to visually see the change.

Before the Activity

Students should have an understanding of how to calculate 1-Var Stats and create scatterplots.

During the Activity

Students will have to determine the UCL (upper control limit) & LCL (lower control limit) along with a centerline. The UCL & LCL are usually placed 3 standard deviations above and below the centerline. If the sample mean exceeds these limits, the process is out of control!