Performance Charts

A Performance Chart helps define process capability by grouping data by a traceability value (for example, Machine in the following chart example) using a Box and Whisker chart format. This allows for quick visual comparison of data groups by mean and variation.

 

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Note: GainSeeker automatically displays statistics under Performance charts (and Combination charts). After a Performance chart is drawn, you can unselect the checkbox preceding the Show Statistics list under chart setting to stop displaying the statistics on the open chart. Then, If you duplicate that chart to draw new charts, the new charts (except any Performance and Combination charts) also will not display statistics.

Performance chart options

Change Graph (chart) type

Show box values on the chart

Show data on graph

Show entire chart element outside limits

Value to display on graph =

Grouping data

You can group the chart data by anchor point, traceability, date or time, subgroups, or choose not to group the data.

  1. Right-click anywhere on the chart to display the right-click menu.

  2. Click Group data.... on the menu.

The Group SPC Data dialog box opens. See Grouping SPC Data.

Displaying labels for data groups

You can opt to display all, some, or none of the data group labels on a Performance Chart. See Group label Example for a practical usage of this option.

  1. Right-click anywhere on the chart to display the right-click menu.

  2. Click Group labels... on the menu.

The Pick Group Labels to Display dialog box opens with all the data group labels selected (highlighted) in the list.

  1. Select the labels to display on the chart (refer to the following table for help).

  2. Then, click OK on the dialog box.

To:

Do this on the Pick Group Labels to Display dialog box

Clear all selections on the list—

Press Clear All

Select all list items—

Click Select All

Select one item—

Click a label in the list

Select several labels listed in sequence—

  1. Click the first list you want to select
    Press and hold the SHIFT key

  2. Click the last label you want and click on it

All labels between the first and last label will be selected.

or

  1. Click the first or last group label you want to select.

  2. Press and hold the SHIFT key.

  3. Press the arrow keys on the keyboard to scroll up or down the list.

Select several labels not listed in succession—

  1. Click a label and press and hold the CTRL ("control") key while clicking additional labels.

Group Label Example

In this example, the chart data is grouped by operator, so all the machine operator names are highlighted in the Pick Group labels to Display list. The user only wants to display the label for 2654 Thomas R., the operator whose process is exhibiting the least variation on this chart.

When only that label is selected in the list, the resulting chart displays only that label.

Displaying statistics under a Performance Chart

You can select the statistics to display under a Performance chart.

More Performance Chart settings options