Lean Six Sigma Yellow Belt Certification Assessment 2 — Questions and Answers
Question 1: In Lean Six Sigma, what does a Process Capability Index (Cpk) value of 1.33 indicate?
- The process is barely meeting specifications
- The process is capable and meeting specifications with margin (Correct answer)
- The process is out of control
- The process needs immediate corrective action
Correct answer: The process is capable and meeting specifications with margin
A Cpk of 1.33 means the process is producing output well within specification limits, reflecting a capable and stable process.
Question 2: Which assessment tool is used to visually map all steps in a process and identify value-added versus non-value-added activities?
- Control chart
- Value Stream Map (Correct answer)
- Pareto chart
- Scatter diagram
Correct answer: Value Stream Map
A Value Stream Map (VSM) visually depicts the flow of materials and information and distinguishes value-added from non-value-added steps.
Question 3: A Yellow Belt team is assessing a process and finds a sigma level of 2. What does this mean?
- The process has very few defects
- The process produces about 308,537 DPMO (Correct answer)
- The process is world-class
- The process sigma is above target
Correct answer: The process produces about 308,537 DPMO
A sigma level of 2 corresponds to approximately 308,537 defects per million opportunities, indicating a poorly performing process.
Question 4: What is the purpose of a Gage R&R study in a Lean Six Sigma assessment?
- To map customer requirements
- To evaluate measurement system variation due to repeatability and reproducibility (Correct answer)
- To calculate process cycle time
- To identify the root cause of defects
Correct answer: To evaluate measurement system variation due to repeatability and reproducibility
Gage R&R (Repeatability and Reproducibility) assesses whether a measurement system contributes excessive variation that could mask true process performance.
Question 5: During process assessment, a team calculates a Rolled Throughput Yield (RTY) of 0.72. What does this indicate?
- 72% of units pass through all process steps defect-free (Correct answer)
- 72% of defects are caught at final inspection
- 28% of the cycle time is value-added
- The process sigma level is 0.72
Correct answer: 72% of units pass through all process steps defect-free
RTY of 0.72 means only 72% of units complete all process steps without any defect or rework, revealing hidden factory losses.
Question 6: Which of the following best describes 'baseline data' in the context of a Six Sigma assessment?
- Data collected after improvements are implemented
- Pre-improvement data used to quantify current process performance (Correct answer)
- Data from the control phase only
- Customer satisfaction survey results
Correct answer: Pre-improvement data used to quantify current process performance
Baseline data captures current performance before any changes so the team can measure the actual impact of improvements.
Question 7: A team assessing cycle time finds that the average is 10 minutes but the takt time is 8 minutes. What does this imply?
- The process is faster than customer demand
- The process cannot keep up with customer demand (Correct answer)
- The process has excess capacity
- Takt time and cycle time are equal
Correct answer: The process cannot keep up with customer demand
When cycle time exceeds takt time, the process produces too slowly to meet customer demand, signaling a bottleneck.
Lean Six Sigma Yellow Belt Certification Assessment 2
In Lean Six Sigma, what does a Process Capability Index (Cpk) value of 1.33 indicate?