Lesson 10: Yellow Belt review and sitting the practice certification exam

1. Which phases of DMAIC does the IASSC Yellow Belt Body of Knowledge cover?

1. All five phases in full depth, including regression and design of experiments in Improve
2. Analyze and Improve only
3. Define, Measure, and basic Control, without the Analyze or Improve statistics
4. Control only

2. What is the real IASSC Yellow Belt exam's format?

1. 60 questions, 2 hours, closed book apart from the IASSC reference document, 70 percent to pass
2. 100 questions, 3 hours, closed book with a printed formula sheet that candidates bring with them
3. 25 questions, 30 minutes, open note
4. 150 questions, 4 hours, open book

3. What connects a project's CTQ, its primary metric, and the X-Y diagram?

1. All three are calculated using Cp and Cpk once the measurement system has passed its Gage R&R study
2. They only apply to attribute data
3. The Y = f(x) strategy: a project is a search for which X's actually drive the Y that matters
4. They are unrelated tools used on separate projects

4. Why does RTY multiply step-level FTYs rather than average them?

1. Because multiplication always produces a higher number than averaging
2. Because it correctly compounds each step's imperfection, showing why a process can look fine step by step but perform poorly overall
3. Because averaging is mathematically impossible for percentages
4. Because RTY only applies to a single-step process

5. Why is a trustworthy measurement system, confirmed through MSA and Gage R&R, a precondition for a meaningful Cp or Cpk?

1. Because Cp and Cpk are only used for attribute data
2. Because Gage R&R replaces the need for a capability study entirely
3. It is not actually related to capability at all
4. Because a capability study relies on the data being accurate and consistent; an untrustworthy measurement system undermines everything calculated from it

6. Why is prevention-type Poka-Yoke conceptually similar to preferring internal failure costs over external failure costs?

1. Because Poka-Yoke replaces the need to calculate COPQ
2. They are unrelated Six Sigma concepts
3. Because both only apply to service industries, where errors are caught by a customer rather than by an inspector
4. Both reflect that catching or preventing a problem earlier is generally cheaper than catching it later

7. A process has a good Cp but a poor Cpk. Which lesson's concept explains this combination?

1. Kanban: the process is pulling too much inventory
2. SIPOC: the process boundaries were defined incorrectly
3. Pareto analysis: the wrong defect category was prioritized, so the 20 percent of causes that matter were missed
4. Process capability: the process is not too variable but is off-center relative to the specification

8. Which Measure-phase tool most directly feeds the list of potential X's that later gets prioritized on an X-Y diagram?

1. Rolled Throughput Yield
2. The control plan
3. The fishbone diagram, whose branches organize possible causes across standard categories
4. The 5S audit

9. What happens to a good improvement that has no control plan and no response plan behind it?

1. Nothing; control plans are optional paperwork that only matters for the audit of a finished project
2. It tends to erode back toward the old, broken state once the project team disbands
3. It is guaranteed to hold indefinitely with no further action
4. It automatically becomes a hard savings figure

10. Which two Green Belt topics come next after this Yellow Belt tier, according to this lesson?

1. The Yellow Belt exam format, repeated for Green Belt
2. The Analyze phase's root-cause statistics and the Improve phase's regression and design of experiments
3. 5S and Kanban, repeated at a deeper level
4. Only Cost of Poor Quality, expanded further

11. DPMO (Defects Per Million Opportunities), covered in Lesson 2, is calculated using which formula?

1. (Defects / (units × opportunities)) × 1,000,000
2. (Units × opportunities) / defects
3. Defects × opportunities, divided by 100
4. Defects per unit, with no adjustment for opportunities

12. According to the Y = f(x) framework from Lesson 1 and the financial benefits material from Lesson 3, why does a Six Sigma project's business case typically include a financial benefit calculation?

1. Because IASSC requires it as a condition of certification, with no other purpose
2. Because financial figures are easier to gather than process data
3. Because it replaces the need to define a CTQ
4. To connect the project's improvement to a concrete cost or revenue impact the business voice (VOB) cares about, justifying the resources the project consumes

13. Which of the following is one of the seven classic Lean wastes (Muda) covered in Lesson 4?

1. Capability
2. Overproduction
3. Standardization
4. Reproducibility

14. What do the five S's in 5S, covered in Lesson 4, stand for, in order?

1. Straighten, Sort, Sustain, Shine, Standardize, with Sustain performed before Shine
2. Sort, Straighten (Set in order), Shine, Standardize, Sustain
3. Shine, Sort, Sustain, Standardize, Straighten
4. Sort, Standardize, Shine, Sustain, Straighten

15. In a SIPOC diagram, covered in Lesson 5, what does the "C" stand for?

1. Customer
2. Capability
3. CTQ
4. Control

16. In FMEA, covered in Lesson 5, the Risk Priority Number (RPN) is calculated by multiplying which three ratings together?

1. Severity × Cost × Frequency
2. Occurrence × Detection × Cycle time
3. Severity × Detection × Sample size
4. Severity × Occurrence × Detection

17. Under the empirical rule for a normal distribution, covered in Lesson 6, approximately what percentage of values fall within three standard deviations of the mean?

1. Roughly 99.7 percent
2. Roughly 68 percent, the share within one standard deviation
3. Roughly 80 percent
4. Roughly 95 percent

18. In MSA, covered in Lesson 7, which term describes the variation seen when different appraisers measure the same part using the same gage?

1. Bias, the offset from a known reference value
2. Linearity
3. Reproducibility
4. Stability

19. Cp, covered in Lesson 8, compares the specification width against which measure of process spread?

1. Six standard deviations (6σ)
2. The median absolute deviation
3. The range only
4. One standard deviation

20. Which Lean control tool from Lesson 9 is a pull system that triggers replenishment or production only when downstream demand calls for it?

1. A capability study
2. Attribute agreement analysis
3. Kanban
4. A control chart