Lean Six Sigma Green Belt Certification FREE Certified Six Sigma Green Belt Questions and Answers 2 — Questions and Answers
Question 1: What is the primary purpose of a SIPOC diagram in the Define phase of DMAIC?
- To provide a high-level overview of the process including suppliers, inputs, process steps, outputs, and customers (Correct answer)
- To calculate the sigma level of a process
- To identify the root cause of defects
- To establish control limits for process monitoring
Correct answer: To provide a high-level overview of the process including suppliers, inputs, process steps, outputs, and customers
A SIPOC diagram maps out Suppliers, Inputs, Process, Outputs, and Customers to give teams a high-level understanding of the process scope.
Question 2: In a hypothesis test, what does a Type II error represent?
- Rejecting a true null hypothesis
- Failing to reject a false null hypothesis (Correct answer)
- Accepting an alternative hypothesis correctly
- Rejecting a false null hypothesis
Correct answer: Failing to reject a false null hypothesis
A Type II error (beta error) occurs when you fail to reject the null hypothesis even though it is actually false.
Question 3: Which tool is most appropriate for identifying potential failure modes and their effects on a process?
- Pareto chart
- Control chart
- Failure Mode and Effects Analysis (FMEA) (Correct answer)
- Histogram
Correct answer: Failure Mode and Effects Analysis (FMEA)
FMEA systematically evaluates potential failure modes, their causes, effects, and risk priority numbers to prioritize corrective actions.
Question 4: What does Cp measure in process capability analysis?
- The ratio of specification width to process spread without considering centering (Correct answer)
- The ratio of specification width to process spread accounting for centering
- The percentage of defects per million opportunities
- The long-term variability of a process
Correct answer: The ratio of specification width to process spread without considering centering
Cp compares the width of the specification limits to the width of the process variation (6 sigma) without accounting for how well the process is centered.
Question 5: During the Improve phase, which method is used to systematically test multiple factors and their interactions simultaneously?
- Regression analysis
- Design of Experiments (DOE) (Correct answer)
- Benchmarking
- Brainstorming
Correct answer: Design of Experiments (DOE)
Design of Experiments allows practitioners to vary multiple factors simultaneously to determine which factors and interactions significantly affect the output.
Question 6: What is the purpose of a control plan in the Control phase of DMAIC?
- To document the procedures, monitoring methods, and response plans needed to sustain improvements (Correct answer)
- To calculate the financial savings of the project
- To define the project charter and scope
- To perform a measurement system analysis
Correct answer: To document the procedures, monitoring methods, and response plans needed to sustain improvements
A control plan documents how the improved process will be monitored, who is responsible, and what actions to take if the process goes out of control.
Lean Six Sigma Green Belt Certification FREE Certified Six Sigma Green Belt Questions and Answers 2
What is the primary purpose of a SIPOC diagram in the Define phase of DMAIC?