reproducibility (gage r&r)

  1. Ron Rompen

    GR&R on Automated Inspection Cell

    Haven't been able to find any previous references to this question, but I am sure that some of the members here will have suggestions as to how to approach this issue. I have been instructed to perform GR&R on an automated inspection cell. There are several discreet test stations in the cell...
  2. W

    Reproducibility on Different Machines of the same Configuration

    I performed a GRR on 5 lines of the same configuration. Intercepted 10 products on 1 line and measured them twice on each line with a measurement system of the same type. So reproducibility describes the variance added by the measurement systems on different lines and not by different operators...
  3. B

    NDC - Gauge R&R Studies with results where NDC = 1 or 0

    I am doing Gauge R&R studies and am coming up with results where NDC = 1 or 0. Our process has very tight reproducibility, yet our customer specs for products are quite wide. This is leading to product being used in Gauge R&R that are much tighter than spec (eg. range is 120.0 +- 2.0 mm, but...
  4. Z

    How many parts to measure in a Gage R&R study

    I'm in the process of setting up a Gage R&R study and need to know how many different parts to measure. The parts that I'm measuring are all wood parts coming off of a molder. Between the 4 different parts we make, there are 20 different dimensions that are checked on a regular basis with a 6"...
  5. C

    Gage R&R not passing for Check Valves Crack Pressure - No Reproducibility

    I was assigned to qualify a test fixture for measuring check valves crack pressure tolerance which is 6-8 inches of water column.This test fixture is calibrated & accurate within +/- 0.1" water column. I did 3 Anova Gage studies with no success (10 parts, 3 operators, 3 times total 90...
  6. T

    Value of K1, K2, K3 in GR&R - I want to measure Repeatability and Reproducibility

    Hey There, What should be the value of K1, K2 and K3 if I want to measure Repeatability and Reproducibility for more than 3 trials, more than 3 Appraisers and more than 10 parts? Thanks in advance. :confused:
  7. H

    Gage R&R - No Repeats - Parts measured by my company and an outside supplier

    My company measured some parts then sent the same parts to an outside vendor. They'd like to check the results are comparable. I can run 2 sample t-tests and other hypothesis tests to check the basics. But I'd like to be able to look at it like a GR&R, while skipping the influence of...
  8. C

    Conclusions from weird GR&R (Gage R&R) Results - 9 of 12 points have NDC of 1

    Hello, (I am new here, hope I don't accidentally break any rules) I have to perform a GR&R test for a measurement machine here. It measures 12 points, compares to spec, and gives pass/fail result (fails when one or more points is out of spec) I have been running a serie of GR&R-tests using 3...
  9. Miner

    Intro to MSA of Continuous Data - Part 9: %Tolerance for One-sided Specs

    This is the ninth in a series of articles about MSA. The focus of this article will be on discussing the proper approach to evaluating Repeatability and Reproducibility as a % of Tolerance when the tolerance is one-sided. The AIAG MSA manual is silent on this and no other "guru" that I am...
  10. Miner

    Intro to MSA of Continuous Data – Part 8: Comparison of Two Gages

    This is the eighth in a series of articles about MSA. The focus of this article will be on assessing the measurement reproducibility between two measurement systems that must measure the same characteristic. Does the following scenario seem familiar? An operator performs an online test...
  11. Miner

    Intro to MSA of Continuous Data – Part 7: R&R using Wheeler’s Honest Gage Study

    This is the seventh in a series of articles about MSA. The focus of this article will be on alternative approaches to evaluating the repeatability and reproducibility (R&R) of a measurement system. The de facto standard for R&R studies has been the approach documented in the AIAG MSA...
  12. Miner

    Intro to MSA of Continuous Data – Part 6: R&R for Non-Replicable Measurements

    This is the sixth in a series of articles about MSA. The focus of this article will be on measurement repeatability and reproducibility for non-replicable measurement systems, commonly called a destructive test. Okay, what exactly is a non-replicable measurement system and why is it not...
  13. Miner

    Intro to Measurement System Analysis (MSA) of Continuous Data – Part 5b: R&R

    Interpreting the ANOVA One area where the MSA manual is silent is the interpretation of the ANOVA table, particularly the p-values. See the following ANOVA table: Source of Variation df SS MS F p Reproducibility (3 operators) 2 ## ## # 0.47 Parts (10 parts) 9 ## ## # .001 Pure Error...
  14. Miner

    Intro to Measurement System Analysis (MSA) of Continuous Data – Part 5a: R&R

    This is the fifth in a series of articles about MSA. The focus of this article will be on measurement repeatability and reproducibility commonly referred to as a gage R&R study. This article will deal solely with the AIAG MSA methodology. The AIAG methodology is the methodology required...
  15. Marc

    Gage R&R (Repeatability and Reproducability) - Tolerance vs. Variation

    Posted for Teguh Sujatno: Subject: MSA and Calibration Date: Thu, 21 Jan 1999 22:37:43 +0000 As you can see, in the MSA manual issued by the Big Three, calculation of gage R&R uses total variation instead of tolerance. Currently I have a problem in my client ( I am a consultant), since its...
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