Variables Control Charts for Individuals Overview
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Variables control charts for individuals plot statistics from continuous measurement data, such as length or pressure, for individuals data. Variables control charts for subgroups, time-weighted charts, and multivariate charts also plot measurement data. Attributes control charts plot count data, such as the number of defects or defective units.

For more information about control charts, see Control Charts Overview.

Choosing a variables control chart for individuals

Minitab offers five variables control charts:

·    I-MR - an Individuals chart and Moving Range chart displayed in one window

·    Z-MR - a chart of standardized individual observations and moving ranges from short run processes

·    Individuals - a chart of individual observations

·    Moving Range - a chart of moving ranges