The EWMA – Exponentially Weighted Moving Average chart is used to monitor variables that make use of the entire history of a given output.
Cumulative sum chart (CUSUM) is a type of control chart used to detect the deviation of the individual values or subgroup mean from the target value.
An Individual moving range chart (I-MR Chart) also called X-MR is used when data is continuous and not collected in subgroups (n=1).
Statistical process control (SPC) is a technique for applying statistical analysis to measure, monitor, and control processes.
An X-bar, S chart is actually 2 plots between the process mean and the process range over time and is an example of statistical process control.