Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Certification MCQ 5 — Questions and Answers
Question 1: Which role in a Lean Six Sigma organization typically leads Black Belt projects and serves as a full-time change agent?
- Yellow Belt
- Green Belt
- Black Belt (Correct answer)
- Master Black Belt
Correct answer: Black Belt
Black Belts are full-time Six Sigma experts who lead complex projects and mentor Green Belts and Yellow Belts.
Question 2: In FMEA (Failure Mode and Effects Analysis), the Risk Priority Number (RPN) is calculated as:
- Severity + Occurrence + Detection
- Severity × Occurrence × Detection (Correct answer)
- Severity × Occurrence / Detection
- (Severity + Occurrence) × Detection
Correct answer: Severity × Occurrence × Detection
RPN = Severity × Occurrence × Detection, where each factor is rated on a scale (typically 1–10) to prioritize failure modes.
Question 3: What does 'Kaizen' mean in the context of Lean Six Sigma?
- Eliminate all waste immediately through radical redesign
- Continuous, incremental improvement involving all employees (Correct answer)
- Standardize work to eliminate all variation
- Automate processes to remove human error
Correct answer: Continuous, incremental improvement involving all employees
Kaizen is a Japanese philosophy meaning 'change for better,' focusing on small, continuous improvements made by everyone in the organization.
Question 4: A team notices a process average is stable but the range is increasing over time on a control chart. What is the most likely conclusion?
- The process mean has shifted
- Process variability is increasing — a special cause may be present (Correct answer)
- The process is perfectly in control
- Sample size is too small to draw conclusions
Correct answer: Process variability is increasing — a special cause may be present
An increasing range on the R-chart signals growing process variability, which may indicate a special cause even if the mean is stable.
Question 5: Which type of data is best described as 'counted data' that can only take whole number values (e.g., number of defects per unit)?
- Continuous data
- Attribute data
- Discrete data (Correct answer)
- Variable data
Correct answer: Discrete data
Discrete (count) data consists of countable whole numbers, such as the number of defects, errors, or occurrences per unit.
Question 6: In a Value Stream Map, activities that do not add value but are currently necessary due to regulatory or system constraints are classified as:
- Value-added activities
- Non-value-added but necessary activities (Correct answer)
- Pure waste to be eliminated immediately
- Optional improvement opportunities
Correct answer: Non-value-added but necessary activities
Some non-value-added steps — like mandatory inspections or compliance checks — must be retained for now and are classified as necessary but non-value-added.
Question 7: Which of the following best describes the purpose of a 'Run Chart' in Lean Six Sigma?
- To display the distribution shape of a dataset
- To track a process metric over time and identify trends or shifts (Correct answer)
- To compare variance between two or more groups
- To rank defect categories from most to least frequent
Correct answer: To track a process metric over time and identify trends or shifts
A Run Chart plots data points in time sequence to reveal trends, cycles, or shifts in a process metric before applying statistical control limits.
Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Certification MCQ 5
Which role in a Lean Six Sigma organization typically leads Black Belt projects and serves as a full-time change agent?