Median chart: What is it?

A median chart is a special purpose variation of the X-bar chart. This chart uses the median instead of the subgroup average to show the system’s central location. The median is the middle point when data points are arranged from high to low. The chart shows all the individual readings. Use charts to determine if the system is stable and predictable or to monitor the effects of process improvement theories.

Although median charts show both central location and spread, they are often paired with range charts.

See also:
>Median chart: What does it look like?
>Median chart: When is is used?
>Median chart: Getting the most