Certified Six Sigma Black Belt Exam FREE Certified Six Sigma Black Belt Basic Questions and Answers 2 — Questions and Answers
Question 1: Which Six Sigma methodology is specifically designed for creating new processes or products rather than improving existing ones?
- DMAIC
- DMADV (Correct answer)
- PDCA
- 8D
Correct answer: DMADV
DMADV (Define, Measure, Analyze, Design, Verify) is used for designing new processes or products to Six Sigma quality levels.
Question 2: What is the primary purpose of a SIPOC diagram in the Define phase?
- To identify root causes of defects
- To provide a high-level overview of the process including suppliers, inputs, process, outputs, and customers (Correct answer)
- To calculate process capability
- To prioritize improvement projects
Correct answer: To provide a high-level overview of the process including suppliers, inputs, process, outputs, and customers
A SIPOC diagram maps out Suppliers, Inputs, Process, Outputs, and Customers to establish a high-level understanding of the process scope.
Question 3: In hypothesis testing, what does a Type II error represent?
- Rejecting a true null hypothesis
- Failing to reject a false null hypothesis (Correct answer)
- Accepting the alternative hypothesis correctly
- Rejecting the alternative hypothesis correctly
Correct answer: Failing to reject a false null hypothesis
A Type II error (beta error) occurs when the test fails to detect a real difference, meaning a false null hypothesis is not rejected.
Question 4: What does a Cp value of 1.33 indicate about a process?
- The process is not capable
- The process is marginally capable
- The process is capable with some margin of safety (Correct answer)
- The process has excessive variation
Correct answer: The process is capable with some margin of safety
A Cp of 1.33 indicates the process spread fits within the specification limits with a safety margin, corresponding to approximately 4-sigma capability.
Question 5: Which tool is used to prioritize potential failure modes based on severity, occurrence, and detection ratings?
- Pareto chart
- Failure Mode and Effects Analysis (Correct answer)
- Control chart
- Cause-and-effect diagram
Correct answer: Failure Mode and Effects Analysis
FMEA uses Risk Priority Numbers calculated from severity, occurrence, and detection ratings to prioritize failure modes for corrective action.
Question 6: What is the purpose of a Gage R&R study in the Measure phase?
- To calibrate measurement instruments
- To assess the variation contributed by the measurement system itself (Correct answer)
- To determine sample size requirements
- To validate control chart limits
Correct answer: To assess the variation contributed by the measurement system itself
Gage R&R (Repeatability and Reproducibility) quantifies how much of the observed variation is due to the measurement system versus the actual process.
Certified Six Sigma Black Belt Exam FREE Certified Six Sigma Black Belt Basic Questions and Answers 2
Which Six Sigma methodology is specifically designed for creating new processes or products rather than improving existing ones?