To display a historical chart
main topic     example      

To define stages in your process, you must set up a column of grouping indicators. The indicators can be numbers, dates, or text. When executing the command, you can tell Minitab to start a new stage in one of two ways:

·    Each time the value in the column changes

·    At the first occurrence of one or more values

The column must be the same length as the data column (or columns, when subgroups are across rows).

1    In the control chart dialog box, click control chart Options.

2    Click the Stages tab.

3    In Define stages (historical groups) with this variable, enter the column which contains the stage indicators.

4    Under When to start a new stage, do one of the following:

·    To start a new stage each time the value in the column changes, choose With each new value.

·    To start a new stage at the first occurrence of a certain value, choose With the first occurrence of these values. Enter the values. Enclose date/time or text entries in double quotes. You can enter the same value more than once; Minitab treats each repeated value as a separate occurrence.

5    If you like, use any dialog box options, then click OK.