Black Belt generated the following Gage R&R; study from Minitab t evaluate the g

Question

Black Belt generated the following Gage R&R; study from Minitab t evaluate the gage. What does the data show: Gage R&R; (ANOVA) for Response Reported by Gage name Date of study Msc s0 R Chart by Operator oar Chart by Operator Part % contribution of Part variation is large due to repeated measurement differences between operator 1 and other operators Gage is acceptable due to small % contribution of part to part variation vs % gage R&R; variance contribution % contribution of Reproducibility variation is large due to differences between operator 1 and other2 O Gage has a repeatability problem and is unacceptable

Explanation / Answer

Black belt generated following gage RR study from Minitab to evaluate the gage: Ans % of reproducibility variation is variation is large due to differences between operator 1 and operator and other 2. Figure 1. % of tolerance is higher than 30% which is unacceptable. The variation is coming from “repeat” and “Reprod” group. In this case, the variation is coming from reproducibility operator. Range chart by the operator: In the R chart, most data points are out of control indicating no control inconsistency of measurement. X Bar chart by the operator: In the X bar shows part variation is out of control but easy to detect as the points are outside the control limits. Variation by part sample: The variation in part charts should be wide, in case variation is around the average, it indicates one part is very different from the other. The overall average of the operator: One operator has influence over the measurement as it's not according to the average required. The measurement system is inadequate. Operator sample interaction: Operator parts are indicated by parallel lines means there is no interaction.

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