Use T² Chart to simultaneously monitor whether the process locations of two or more related variables are in control. This chart is the multivariate counterpart to the Xbar and Individuals charts.
For example, an engineer uses a T2 chart to monitor temperature and pressure in a plastic injection-molding process. Because temperature and pressure both affect the plastic strength, the engineer wants to monitor these variables at the same time.
Where to find this control chart
To create a T2 chart, choose Stat > Control Charts > Multivariate Charts > T<sup>2</sup>.