View and Analyze Created Control Charts

Explanation

This activity is used to view and analyze any created control charts.

Open the control chart that you want to view on the p Chart, np Chart, c Chart, u Chart Xbar and R Chart, Xbar and S Chart or X and MR Chart page. These pages can also be accessed from the Control Charts page.

Control charts are used to analyze a process or its outputs and take appropriate actions to achieve and maintain a state of statistical control. A process is in statistical control ("in control") when all special causes of variation have been eliminated and only common causes remain, i.e., observed variation can be attributed to a constant system of chance causes.

Several statistical tests (alarm rules) can be used to determine whether a control chart is "in control" or "out of control":

One or more of these alarm rules may have been activated for the control plan line (data point). If an alarm rule violation occurs for an activated alarm rule, information about the alarm rule violation will be displayed in the control chart.

If you want to see all the measurement data used for the calculations of the control chart, click Sample Data. If you want to view the analysis numbers that were excluded when the control charts were created, click Not Included Sample Data. The graph can be printed by clicking Print Graph. To view the control chart setup used to create the chart, click View Setup.

Prerequisites

At least one control chart of the type you want to view must exist.

System Effects

As a result of this activity, any created control chart can be viewed and analyzed.