CQE Measurement Systems Analysis 2

Question 1

According to the AIAG MSA manual, a Gauge R&R result is generally considered acceptable when % Gauge R&R is:

Accepted Answer

Less than 30%, where under 10% is ideal and 10–30% may be acceptable based on application

Answer

The AIAG MSA manual classifies % Gauge R&R under 10% as acceptable, 10–30% as marginal (may be acceptable based on importance and cost), and over 30% as generally unacceptable.

Question 2

The 'number of distinct categories' (ndc) in a Gauge R&R study indicates:

Accepted Answer

The number of non-overlapping categories the gauge can reliably distinguish within process variation

Answer

The ndc represents how many statistically distinct groups can be detected within the process variation; a value of 5 or more is required for the gauge to be considered adequate.

Question 3

The %P/T ratio in measurement systems analysis compares:

Accepted Answer

Measurement system variation to the engineering specification tolerance

Answer

The %P/T (Precision-to-Tolerance) ratio expresses the gauge's measurement variation as a percentage of the specification tolerance, showing how much of the tolerance band is consumed by measurement error.

Question 4

The standard design for a crossed Gauge R&R study per AIAG MSA guidelines typically includes:

Accepted Answer

2 or 3 operators, 10 parts, and 2 or 3 measurement trials per part per operator

Answer

AIAG recommends 2–3 operators, 10 parts, and 2–3 trials, providing sufficient data to estimate both repeatability and reproducibility while remaining practical to conduct.

Question 5

Compared to the Average and Range method, the ANOVA method in Gauge R&R analysis provides the additional ability to:

Accepted Answer

Detect and quantify the operator-by-part interaction effect

Answer

The ANOVA method partitions variance into repeatability, reproducibility, and the operator-by-part interaction term, providing richer information about how operator and part effects combine.

CQE - Certified Quality Engineer Practice Test

CQE - Certified Quality Engineer Practice Test

CQE Measurement Systems Analysis 2