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2. Measurement Process Characterization


Gauge R & R studies

The purpose of this section is to outline the steps that can be taken to characterize the performance of gauges and instruments used in a production setting in terms of errors that affect the measurements.

What are the issues for a gauge R & R study?

What are the design considerations for the study?

  1. Artifacts
  2. Operators
  3. Gauges, parameter levels, configurations

How do we collect data for the study?

How do we quantify variability of measurements?

  1. Repeatability
  2. Reproducibility
  3. Stability

How do we identify and analyze bias?

  1. Resolution
  2. Linearity
  3. Hysteresis
  4. Drift
  5. Differences among gauges
  6. Differences among geometries, configurations

Remedies and strategies

How do we quantify uncertainties of measurements made with the gauges?

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