Quality and Reliability Methods - SAS

Chapter 8 Assess Measurement Systems 135
Additional Example of Measurement Systems Analysis
Figure 8.8 Parallelism Plot
Looking at the parallelism plot by operator, you can see that the lines are relatively parallel and that there is
only some minor crossing.
Examine Operator Consistency
Take a closer look at the variance between operators. From the red triangle menu next to Measurement
Systems Analysis, select Test-Retest Error Comparison.
Figure 8.9 Test-Retest Error Comparison
Looking at the Test-Retest Error Comparison, you can see that none of the operators have a test-retest error
that is significantly different from the overall test-retest error. The operators appear to be measuring
consistently.