Evaluates the repeatability and reproducibility of a measurement system used to measure a continuous variable. To use this tool, multiple operators must be able to measure all parts used in the study multiple times. You should answer the question of whether you can trust your data before you calculate a baseline or attempt any improvement.
|When to Use||Purpose|
|Start of project||Verify you can precisely measure process outputs before attempting to perform a baseline analysis.|
|Mid-project||Verify you can precisely measure process inputs that you are investigating.|
|End of project||Verify you precisely measure process outputs after improvements have been made. It is common to reduce variation to a point where you cannot do so with the pre-improvement measurement system.|
|End of project||Verify you can precisely measure critical process inputs that need to be controlled to maintain the improvements. These should have been already verified earlier in the project.|
Continuous Y, two X-variables (typically operator and part).