Exercise 11.13.2

Model Answers to 11 Evaluation of Measurement Systems in Six Sigma Statistics using Minitab 17, Green Belt Edition.

Example 11.13.2 Conduct an Attribute Agreement Analysis


Data collection for an Attribute Agreement Analysis has been conducted with 3 operators, 2 repeats and 40 parts. Conduct the analysis and answer the questions shown below and then answer the questions shown below.


The data in File 11 MSA.xlsx worksheet Exercise2.

  1. How is the good appraisal system?
  2. Are any of the Appraisers different from the other Appraisers?
  3. Are any of the parts difficult to appraise?
  4. Are the appraisers failing more good parts or passing bad parts?









Set-Up

Analysis

  1. Click Assistant<<Measurement System Analysis
  2. Click on the Attribute Agreement Analysis box which is used to assess appraisers.
  3. Complete the menu as shown and click on OK to execute the procedure.






On the Summary Report, the accuracy rating is 86.3% and this sounds good but we can’t tell if the Appraisal system is good as there are no standard values for acceptance.









On the Summary Report, the accuracy rating is 86.3% and this sounds good but we can’t tell if the Appraisal system is good as there are no standard values for acceptance.









On the Accuracy Report we see that the 95%CI’s for the accurate appraisal for good and bad parts overlap so we cannot say that they are different.










From the Misclassification report it would appear that part 22 is difficult to appraise. It keeps getting rated good when it is defective.