Lean Six Sigma Black Belt Certification Cheat Sheet 2026

The 30 highest-yield Lean Six Sigma Black Belt Certification facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What sort of outcomes are anticipated from Six Sigma initiatives from a Black Belt? → At least 200,000 USD as annual benefit
2. A tollgate review at the end of the Measure phase reveals that the team's data collection plan has significant gaps. What is the correct action? → Return to Measure to revise and complete the data collection plan
3. Which statistical test is most appropriate for comparing the means of three or more groups in a Lean Six Sigma project? → ANOVA
4. Which assumption is critical for control charts based on the normal distribution to be valid? → Observations must be independent and identically distributed
5. Six Sigma aids in enhancing: → Customer Satisfaction and Profits
6. What is the primary objective of a Gage R&R study in Lean Six Sigma? → To evaluate the measurement system's repeatability and reproducibility
7. A company implements single-piece flow but cycle time exceeds takt time. What is the most appropriate lean response? → Conduct a kaizen to reduce cycle time or rebalance the line
8. In hypothesis testing, what does a Type II error represent in a Six Sigma context? → Failing to reject the null hypothesis when it is actually false
9. During a team meeting, one vocal member dominates the discussion and others stay silent. Which facilitation technique BEST addresses this? → Use structured techniques like round-robin or silent brainstorming
10. When conducting an ANOVA test across four process groups, what does a statistically significant F-statistic tell you? → At least one group mean differs from the others
11. A Black Belt measures cycle time on the same 20 workstations before and after a process change. Which hypothesis test is most appropriate? → Paired t-test
12. In risk management for Six Sigma projects, what does a risk priority number (RPN) in FMEA represent? → The product of Severity, Occurrence, and Detection ratings
13. A Black Belt wants to assess whether a process is in statistical control before calculating capability indices. Which tool is most appropriate? → Control chart
14. In a 2^(k-p) fractional factorial design, what does the value 'p' represent? → The number of generators used to define the fraction
15. Which Lean tool uses visual signals (cards or bins) to authorize and trigger production or material replenishment? → Kanban
16. A Black Belt discovers that a critical X variable has a non-normal distribution. Which approach should be used to establish process capability? → Use a Box-Cox transformation or non-normal capability analysis
17. Which metric best captures the overall effectiveness of a manufacturing process in lean enterprise thinking? → Overall Equipment Effectiveness (OEE)
18. In Total Productive Maintenance (TPM), 'autonomous maintenance' means: → Operators take ownership of routine maintenance tasks for their equipment
19. What does Cp measure in process capability analysis? → The potential capability of a process when centered between specification limits
20. A Black Belt's project team has stalled because a critical resource was reassigned to another initiative. What should the Black Belt do FIRST? → Assess the impact on the project timeline and deliverables before escalating
21. A lean enterprise conducts a 'kaizen event.' What is the primary characteristic that distinguishes a kaizen event from regular improvement activities? → It is a rapid, focused improvement effort typically lasting 3-5 days
22. A Black Belt calculates the process sigma level using a Z-table. Which term describes the area under the curve beyond the specification limit? → Defect probability (tail area)
23. Approximately 68% of the data in a normal distribution will fall within: → +/- 1 standard deviation
24. In a lean enterprise, which concept describes the ideal state where every process step adds value and nothing is wasted? → Perfection
25. What are the two factors that contribute to the accuracy of measurement systems? → Repeatability and Reproducibility
26. What is the primary purpose of an A3 report in lean enterprise management? → Structure problem-solving and communicate issues on a single sheet
27. In a lean value stream map, a 'push' arrow indicates that material is being: → Moved based on a schedule or forecast regardless of downstream need
28. What is the minimum sample size rule of thumb for establishing a reliable process capability study? → At least 50 data points
29. What is the typical cycle time per unit in seconds for a process with an average throughput of 7,200 units per hour? → 0.5
30. What is the primary purpose of a CUSUM chart in SPC? → To detect small, sustained shifts in the process mean over time