Control Charts for Measurements

Select menu: Stats | Six Sigma | Control Charts for Measurements

This menu plots a range of standard control charts for measurements. The type of charts available include the standard charts devised by Shewhart (1931) for the control of manufacturing processes, exponentially weighted moving-average control charts for controlling the mean of a process and cumulative sum (or CUSUM) charts.

After you have imported your data, from the menu select
Stats | Six Sigma | Control Charts for Measurements.
Fill in the fields as required then click Run.

You can set additional options by clicking Options.

Control chart

Specifies the type of control chart.

Data arrangement

Specifies the form of the data. Select List of Samples if the data are supplied in separate variates, select One set with groups if the data are to be supplied as a variate with a grouping factor and select One set equal group size if the data are in a single variate with equal-sized blocks of values for each group.

Available data

This lists data structures appropriate to the current input field. The contents will change as you move from one field to the next. You can double-click a name to copy it to the current input field or type the name.

List of samples

Used to enter the names of the variates containing the data measurements. You can transfer multiple selections from Available data by holding the Ctrl key on your keyboard while selecting items, then click to move them all across in one action. This option is only available when the data arrangement is set to List of Samples.

Samples

Used to enter the name of a variate containing the data measurements. This option is only available when the data arrangement is set to One set with groups or One set equal group size.

Groups

Provides a space to enter a factor identifying the different samples. This option is only available when the data arrangement is set to One set with groups.

Group size

The target value for the sample means. This option is only available for CUSUM charts.

Mean target

Provides a space to enter a value identifying the size of each sample. This option is only available when the Control chart is set to CUSUM.

Action Icons

	Pin	Controls whether to keep the dialog open when you click Run. When the pin is down the dialog will remain open, otherwise when the pin is up the dialog will close.
	Restore	Restore names into edit fields and default settings.
	Clear	Clear all fields and list boxes.
	Help	Open the Help topic for this dialog.