A chart designed to help monitor or analyse a particular process; especially one that allows the spread of data to be analysed by means of a line representing the mean and two further lines at a distance of three standard deviations from the mean.
Origin
1920s.
Definition of control chart in US English:
control chart
noun
A chart designed to help monitor or analyse a particular process; especially one that allows the spread of data to be analysed by means of a line representing the mean and two further lines at a distance of three standard deviations from the mean.