CQE Measurement Systems Analysis

Question 1

In a Gauge R&R study, 'repeatability' refers to variation caused by:

Accepted Answer

The same operator using the same measurement system repeatedly on the same part

Answer

Repeatability (equipment variation) is the variation that occurs when one operator uses the same gauge to measure the same part multiple times under identical conditions.

Question 2

In measurement systems analysis, the difference between accuracy and precision is best described as:

Accepted Answer

Accuracy measures closeness to the true value; precision measures consistency of repeated results

Answer

Accuracy reflects how close the average measurement is to the true or reference value, while precision describes how consistently repeated measurements agree with each other.

Question 3

'Bias' in a measurement system is formally defined as:

Accepted Answer

The difference between the observed average measurement and the accepted reference value

Answer

Bias is the systematic offset between the average of measured values and the reference or true value, indicating a consistent tendency to over-measure or under-measure.

Question 4

'Linearity' in a measurement system describes:

Accepted Answer

The consistency of bias values across the full operating range of a gauge

Answer

Linearity assesses whether the gauge's bias remains constant or changes systematically as the measured value changes across the gauge's operating range.

Question 5

'Stability' in a measurement system refers to:

Accepted Answer

The change in bias of a measurement system over time when measuring the same master part

Answer

Stability (also called drift) is the total variation in measurements obtained with a single gauge on the same master or reference part over an extended time period.

CQE - Certified Quality Engineer Practice Test

CQE - Certified Quality Engineer Practice Test

CQE Measurement Systems Analysis