Why is it important to do regular gage R & R studies? Gage R & R studies are vital to determining the amount of variability within a measurement system. Knowing the magnitude of the variability within a production line allows you to ensure that your measurement system is running smoothly and producing accurate results. In the world of precision measurement, exactness is everything. Should you find after completing a gage R & R study that the variability is too large, you would know for sure that you could not use your system as it is, and that you need to adjust it in some way. Knowing that there is an issue is the first step to fixing it, and making you a better manufacturer. Constant vigilance with the accuracy of your measurements can be accomplished using regular gage R & R studies.