CQI Metrology & Measurement Systems Flashcards

What does GR&R stand for in measurement systems analysis?

Answer: Gage Repeatability and Reproducibility

GR&R stands for Gage Repeatability and Reproducibility, a study used to evaluate the variation within a measurement system.

What does 'repeatability' measure in a GR&R study?

Answer: Variation when the same operator measures the same part multiple times with the same instrument

Repeatability measures the variation attributed to the measurement instrument when used repeatedly under identical conditions by the same operator.

What does 'reproducibility' measure in a GR&R study?

Answer: Variation between different operators using the same instrument

Reproducibility measures the variation that occurs when different operators use the same instrument to measure the same parts.

A GR&R study result showing 30% of process variation attributed to the measurement system is generally considered:

Answer: Marginal and may require improvement

A GR&R value between 10% and 30% is considered marginal and may require corrective action depending on the application.

What is the minimum recommended number of operators in a standard GR&R study?

Answer: 3

A standard GR&R study uses 3 operators, 10 parts, and 2-3 replications to adequately characterize measurement system variation.

Which AIAG manual is the primary reference for Measurement System Analysis (MSA)?

Answer: MSA manual

The AIAG Measurement System Analysis (MSA) manual is the primary reference for conducting and evaluating measurement systems in manufacturing.