Lean Six Sigma Yellow Belt Certification Cheat Sheet 2026

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

1. A Pareto chart is not required when using a histogram for problem-solving: False or true → False
2. Process capability analysis compares: → The natural process spread to the customer specification width
3. What is the appropriate response when a process displays only common cause variation but does not meet customer specifications? → Redesign or fundamentally change the process system
4. Which of the following is a primary waste identified in Lean methodology? → Overproduction
5. How does Lean Six Sigma work? → A process improvement method that combines elements of both Lean and Six Sigma.
6. Which brainstorming technique involves writing ideas on sticky notes silently before group discussion? → Brainwriting
7. Which of the following would give benefits and working conditions the most consideration? → Voice of the Employee
8. Which type of waste occurs when employees spend time searching for tools or information? → Motion
9. The Y in the equation Y = F(X) is → Output
10. Which of the seven wastes refers to producing more than the customer currently demands? → Overproduction
11. What does a Measurement System Analysis (MSA) primarily evaluate? → The reliability and accuracy of the measurement system itself
12. A well-written problem statement in the Define phase should avoid which of the following? → Suggesting a solution or root cause
13. With fewer decisions required, a process is more efficient. → True
14. What does a p-value less than 0.05 typically indicate in the Analyze phase? → The result is statistically significant and the null hypothesis should be rejected
15. Which metric is most appropriate for monitoring whether a sustained process continues to meet customer requirements? → Process Capability Index (Cpk)
16. Which waste category includes unnecessary movement of products between processing steps? → Transportation
17. A point falling outside the control limits on a control chart most likely indicates: → A special cause of variation has occurred
18. What does the term 'Gemba' refer to in Lean practice? → The actual place where work is performed
19. The process map that is generated after identifying areas for improvement on an existing process map is referred to as: → Process map "To-be"
20. What does the term 'Voice of the Customer' (VOC) refer to in Lean Six Sigma? → Customer needs, expectations, and preferences
21. What is the purpose of a Pareto chart in Lean Six Sigma? → Identify the vital few causes that account for most of the problems
22. The histogram is helpful for comprehending the following types of data: → Measurable (continuous)
23. Which tool uses a structured ranking system to compare multiple solutions against weighted criteria? → Pugh matrix
24. What is the concept of 'mistake-proofing' also known as in Lean methodology? → Poka-yoke
25. What does the acronym TIMWOODS represent in Lean Six Sigma? → The eight wastes including non-utilized talent
26. In the Define phase, what is the main benefit of creating a business case for a Lean Six Sigma project? → It justifies the project by linking it to strategic goals and financial impact
27. What are the goals and applications of data visualization? → Allows conclusions to be drawn from graphical data analysis
28. What type of data would 'pass/fail inspection results' be classified as? → Attribute data
29. It is great if your team uses the approach of _________ to create a fishbone diagram and capture all of the problems of interest. → Brainstorming
30. During the Measure phase, what is the purpose of calculating process sigma level? → To quantify how well a process meets customer specifications