A Bullseye Chart is a graphical tool that may be used with variables data (data that is both quantitative and continuous in measurement, such as a measured dimension or time). The Bullseye chart may be used to estimate whether each of two parameters is within its desired or expected range (depending on input parameters). An example Bullseye cahrt from our SPC software is shown above.
In any application, Bullseye Charts are NOT control charts, as they do not have statistical control limits. For that reason, they may not be used to establish statistical control of a process or to measure process capability.