Certified Six Sigma Black Belt Exam Measurement System Analysis (MSA) 5

Question 1

Which of the following is the correct interpretation when a Gauge R&R %GRR (based on study variation) is reported as 8%?

Accepted Answer

The gauge is acceptable for most applications

Answer

Per AIAG guidelines, a %GRR below 10% indicates an acceptable measurement system suitable for most applications.

Question 2

What is the key difference between 'precision' and 'accuracy' in a measurement system?

Accepted Answer

Accuracy refers to closeness to the true value; precision refers to consistency of repeated measurements

Answer

Accuracy (low bias) means measurements are centered on the true value, while precision (low variation) means repeated measurements cluster tightly together regardless of where they center.

Question 3

When should a Expanded Uncertainty be used instead of a simple %GRR in reporting measurement system performance?

Accepted Answer

When measurement results are used for legal, regulatory, or customer-contractual purposes

Answer

Expanded Uncertainty (per ISO/IEC 17025 or GUM) is required for calibration labs and situations where measurement results have legal, regulatory, or contractual significance.

Question 4

A Gauge R&R study is run on a force-testing machine where each tested spring is permanently deformed after measurement. The appropriate study design is:

Accepted Answer

Nested (destructive) Gauge R&R design

Answer

Destructive tests require a nested Gauge R&R design because each part can only be measured once, so operators cannot all measure the identical same parts.

Question 5

In MSA, 'effective resolution' differs from 'stated resolution' because it accounts for:

Accepted Answer

The actual measurement variation relative to the readable increment

Answer

Effective resolution considers whether the gauge's increments are fine enough relative to actual measurement variation to meaningfully distinguish different values.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Measurement System Analysis (MSA) 5