But we’d have noticed serious measurement variations if we’d spent some time looking at gage repeatability and reproducibility instead. We spend a lot of time and money trying to fix it and improve the performance of a process. Gage R&R is very important when new workers are assigned new tools are used, or any significant process changes.įor example, imagine a situation where our performance metrics show a serious problem in our manufacturing process. Then, it compares this variability with the total to determine the actual variability of the measurement system. Gage Repeatability and Reproducibility measure the amount of variability in measurements caused by the measurement system itself. Why is Gage Repeatability and Reproducibility Important? Looking at these two metrics helps us to understand variation in our measurements. In other words, how much variation do we see in measurements taken by different people on the same part using the same tool? Reproducibility: Reproducibility is the difference in the average of the measurements made by different people using the same instrument when measuring the identical characteristic on the same part.In other words, how much variation do we see in measurements taken by the same person, on the same part, using the same tool? Repeatability: Repeatability is the variation between successive measurements of the same part or trait by the same person using the same gage.Gage R&R focuses on two key aspects of measurement:
Or it could be a complex piece of machinery. A gage could be simple, like calipers and rulers. What is a Gage and Gage Repeatability and Reproducibility?Ī gage, in this context, is a tool for measurement.
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