Free Certified Six Sigma Black Belt Practice Questions and Answers Flashcards
6 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 6 Free Certified Six Sigma Black Belt Practice Questions and Answers flashcards as text
A Black Belt discovers that a critical process metric follows a non-normal distribution. Which tool is most appropriate for determining process capability?
Answer: Non-normal capability analysis using Weibull or other fitted distribution
When data is non-normal, fitting an appropriate distribution such as Weibull allows accurate capability analysis without forcing normality assumptions.
During the Analyze phase, a team identifies multiple potential root causes. Which technique best helps prioritize these causes based on both probability and impact?
Answer: Failure Mode and Effects Analysis (FMEA)
FMEA systematically evaluates each potential failure mode by severity, occurrence, and detection to produce a Risk Priority Number for prioritization.
What is the primary purpose of a Gage R&R study in a Six Sigma project?
Answer: To assess the variation contributed by the measurement system relative to total process variation
Gage R&R quantifies how much of the observed process variation is attributable to the measurement system, including both repeatability and reproducibility components.
A Black Belt is designing an experiment with 5 factors, each at 2 levels, but resources allow only 8 runs. Which design is most appropriate?
Answer: 2^(5-2) fractional factorial design
A 2^(5-2) fractional factorial design reduces the full 32-run experiment to 8 runs while still estimating main effects, though some interactions will be confounded.
In a hypothesis test comparing two population means, a Black Belt obtains a p-value of 0.03 with alpha set at 0.05. The practical significance is negligible. What should the Black Belt conclude?
Answer: Report statistical significance but recommend no action due to lack of practical significance
Statistical significance alone does not justify action; a Black Belt must also evaluate whether the difference is large enough to matter practically before recommending changes.
Which of the following best describes the purpose of a control plan in the Control phase?
Answer: To provide a living document that specifies monitoring methods, reaction plans, and responsibilities for sustaining improvements
A control plan documents what to monitor, how to monitor it, acceptable limits, and what actions to take when the process goes out of control to sustain gains.