Assessment 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 Assessment flashcards as text
A Black Belt conducts a process risk assessment using FMEA. Which combination of RPN factors is used to prioritize failure modes?
Answer: Severity, Occurrence, Detection
RPN (Risk Priority Number) = Severity × Occurrence × Detection, with scores on a 1–10 scale for each factor.
A measurement system assessment shows a discrimination ratio (DR) of 3. What does this indicate?
Answer: The gauge is inadequate; DR must be at least 5
A discrimination ratio below 5 indicates the gauge cannot adequately distinguish between parts; a DR ≥ 5 is the minimum acceptable threshold.
Which assessment technique involves tracking a single unit or batch through an entire process to identify all value-added and non-value-added steps?
Answer: Value stream mapping
Value stream mapping documents every step, delay, and resource for a product or service family, categorizing each step as value-added or waste.
A Six Sigma team is assessing whether a new process has a different mean than the historical mean of 50 units. The sample size is 30 and population variance is unknown. Which test is appropriate?
Answer: One-sample t-test
With unknown population variance and n=30, a one-sample t-test is used to compare a sample mean against a known historical value.
During a process assessment, rolled throughput yield (RTY) is calculated across 4 sub-processes with yields of 95%, 92%, 97%, and 90%. What is the RTY?
Answer: 76.4%
RTY = 0.95 × 0.92 × 0.97 × 0.90 ≈ 0.764, or approximately 76.4%.
A Black Belt wants to assess whether defect rates differ significantly across three production shifts. Which statistical test is most appropriate?
Answer: Chi-square test for independence
A chi-square test for independence compares categorical defect counts across groups (shifts), making it appropriate for this assessment.
In capability assessment, what does a Cpm index measure that Cpk does not?
Answer: Process centering relative to the target value
Cpm (Taguchi capability index) penalizes deviation from the nominal target, not just the specification limits, making it target-centric.