Re: Comparison of two gauges
Most MSA software will provide an intermediate calculation of the actual variation due to repeatability , reproducibility, etc. before providing the percentages. These intermediate results are typically in the form of a standard deviation or as an ANOVA table. If you attache your data and/or results, we can help you find this.
Try searching www.pdf-search-engine.com for "Statistical methods for assessing agreement between two methods of clinical assessment" by J. Martin Bland and Douglas G. Altman. MedCalc software also published a very understandable summary of the plot and how to interpret it on their website.
Hi,
1. The 30um is repeatability for Gauge B, stated by the manufacturer. this number is stated by the manufacturer, so, I am looking for a method to verify this number.
2. Gauge A and B are fully automated and no need to consider the error from operator.
3. In our company, we use GRR to qualify a new gauge, however, the GRR does not tell me that if the gauge can meet repeatability of 30um. (Please correct me if I am wrong). GRR only tell me that the repeatability and reproducibility is acceptable or not.
1. The 30um is repeatability for Gauge B, stated by the manufacturer. this number is stated by the manufacturer, so, I am looking for a method to verify this number.
2. Gauge A and B are fully automated and no need to consider the error from operator.
3. In our company, we use GRR to qualify a new gauge, however, the GRR does not tell me that if the gauge can meet repeatability of 30um. (Please correct me if I am wrong). GRR only tell me that the repeatability and reproducibility is acceptable or not.
4. I am familier with "Youden plot", could you state more. For example, if the result from Gauge A and Gauge does not fall closelt to 45, what does it mean?
5. Perhaps "Bland Altman plot" is more better. But, I will need to read more information.
Thanks,
5. Perhaps "Bland Altman plot" is more better. But, I will need to read more information.
Thanks,
