When using an X and MR Chart, MR refers to which one of the following terms?

In the context of an X and MR Chart, MR stands for Moving Range. This term is essential for understanding the second component of the control chart, which focuses on variability in the data over time. The Moving Range is calculated as the absolute difference between consecutive data points. It helps to monitor consistency and variability within a process.

By analyzing the Moving Range, practitioners can identify changes in process variation, which is vital for maintaining control and improving quality. This approach ensures that any fluctuations in data are detected and addressed promptly, allowing for enhanced process stability and predictability. The X and MR Chart, therefore, combines the average of the measurements with the Moving Range to provide a comprehensive view of process behavior and performance over time.