Measurement System Analysis (MSA) 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 (MSA) flashcards as text
Which MSA characteristic describes the change in bias across the operating range of the measurement device?
Answer: Linearity
Linearity assesses whether bias is consistent (or changes) across the full range of expected measurements, often evaluated via regression of bias vs. reference value.
In attribute MSA, 'Kappa' is used to evaluate which of the following?
Answer: Agreement between appraisers accounting for chance agreement
Cohen's Kappa statistic measures inter-rater agreement while correcting for the agreement that would occur by chance alone.
A gauge is measured against a reference standard repeatedly over 30 days, and the average measurement drifts upward over time. This indicates a problem with:
Answer: Stability
Stability (or temporal stability) refers to the change in bias of a measurement system over time under consistent conditions.
When the Number of Distinct Categories (NDC) equals 2, the measurement system can effectively be used for:
Answer: Sorting parts into two groups only (pass/fail)
An NDC of 2 means the gauge can only distinguish between two groups, making it suitable for binary classification (go/no-go) but not for process control.
In a crossed Gauge R&R design, every operator measures every part. The alternative design where each operator measures only a unique subset of parts is called:
Answer: Nested Gauge R&R
A nested (or hierarchical) Gauge R&R design is used when the same part cannot be measured by multiple operators, such as in destructive testing scenarios.
Which formula correctly expresses %Repeatability as a percentage of total Gauge R&R variation?
Answer: σ²_repeatability / σ²_GRR × 100
When partitioning variance components, %Repeatability is calculated as the ratio of repeatability variance to total Gauge R&R variance, expressed as a percentage.
An MSA study is run with 3 operators, 10 parts, and 2 replications. How many total measurements are taken?
Answer: 60
Total measurements = operators × parts × replications = 3 × 10 × 2 = 60.