Gage R&R is the type of Measurement System Analysis (MSA) that is used to quantify how well a variable (continuous) measurement system is working.
Xbar-R (Mean and Range) is a pair of control charts primarily used in Statistical Process Control (SPC) for variable (or continuous) metric when samples are collected at regular intervals from a process. It is a preferred option when the sample size is between 2 and 8. The Range chart helps understand the process variation (and hence is the first chart that is reviewed) while the Xbar chart helps understand the process center. The process is said to be stable only if both the Range and Xbar charts are in control
An application-oriented question on the topic along with responses can be seen below. The best answer was provided by
Amlan Dutta on 12th June 2019.
Applause for all the respondents- Amlan Dutta, Natwar Lal.
Also review the answer provided by Mr Venugopal R, Benchmark Six Sigma's in-house expert.