Measurement System Analysis Flashcards
7 cards from real Certified Six Sigma Black Belt Exam 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 System Analysis flashcards as text
A Black Belt wants to evaluate whether a measurement system is capable of detecting a shift of 1.5σ in the process. Which MSA metric is most directly relevant?
Answer: %Study Variation (%SV)
%Study Variation compares gage variation to the total process spread, directly indicating whether the gage can detect meaningful shifts.
During a Gage R&R ANOVA study, a significant Operator × Part interaction is detected. What does this indicate?
Answer: Some operators are better at measuring specific parts than others, suggesting operator technique varies by part
A significant Operator × Part interaction means operators do not measure all parts consistently relative to each other — certain operators may have difficulty with specific part geometries or sizes.
What is the primary purpose of including at least 10 distinct parts in a crossed Gage R&R study?
Answer: To ensure the parts represent the full range of the process variation
Parts should span the full process variation so the study reflects real-world measurement conditions and provides a valid estimate of %Study Variation.
In a linearity study, a gage shows a slope of +0.08 across the operating range. What does a positive slope indicate?
Answer: Bias increases as the reference value increases
A positive slope in a linearity study means the gage's bias (difference from reference) grows larger as the true value increases.
Which of the following scenarios best describes a Type I error in the context of attribute MSA?
Answer: An appraiser rejects a conforming part (false positive)
A Type I error (producer's risk) occurs when a good part is incorrectly rejected, creating unnecessary scrap or rework.
A torque wrench used in assembly is calibrated against a reference standard once per shift. This practice primarily addresses which MSA characteristic?
Answer: Stability
Periodic calibration checks detect drift over time, which is the definition of monitoring measurement system stability.
In a nested (hierarchical) Gage R&R design, parts are not measured by all operators. When is this design necessary?
Answer: When measurement is destructive or parts cannot be re-measured
A nested design is used when parts are destroyed or altered by measurement, making it impossible for all operators to measure the same parts.