Measurement Systems Analysis Flashcards
7 cards from real CQE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Measurement Systems Analysis flashcards as text
In a Gauge R&R study, 'repeatability' refers to variation caused by:
Answer: The same operator using the same measurement system repeatedly on the same part
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.
In measurement systems analysis, the difference between accuracy and precision is best described as:
Answer: Accuracy measures closeness to the true value; precision measures consistency of repeated results
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.
'Bias' in a measurement system is formally defined as:
Answer: The difference between the observed average measurement and the accepted reference value
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.
'Linearity' in a measurement system describes:
Answer: The consistency of bias values across the full operating range of a gauge
Linearity assesses whether the gauge's bias remains constant or changes systematically as the measured value changes across the gauge's operating range.
'Stability' in a measurement system refers to:
Answer: The change in bias of a measurement system over time when measuring the same master part
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.
The minimum recommended resolution (discrimination) for a measurement instrument should be:
Answer: At least one-tenth of the total tolerance or process variation being measured
The AIAG MSA manual recommends that gauge resolution be at least one-tenth of the tolerance range or process variation so that meaningful differences between parts can be detected.
The primary purpose of a calibration system in a quality management program is to:
Answer: Provide traceability of measurement results to national or international standards
A calibration system maintains measurement accuracy by establishing an unbroken traceability chain linking measurements back to primary standards maintained by organizations such as NIST.