Lean Six Sigma Yellow Belt Certification Trivia 5 — Questions and Answers
Question 1: Which Lean concept refers to leveling or smoothing the production schedule to avoid peaks and valleys in workload?
- Jidoka
- Heijunka (Correct answer)
- Genchi Genbutsu
- Muri
Correct answer: Heijunka
Heijunka is the Lean concept of production leveling — distributing work evenly over time to reduce variability, overburden, and waiting.
Question 2: In Six Sigma, what is the role of a 'Black Belt'?
- Executive sponsor who provides funding
- Full-time project leader who leads complex improvement projects (Correct answer)
- Process operator trained in basic Lean tools
- Consultant who trains other belts
Correct answer: Full-time project leader who leads complex improvement projects
Black Belts are full-time Six Sigma practitioners who lead complex, high-impact improvement projects and mentor Green Belts and Yellow Belts.
Question 3: What does 'SIPOC' stand for in Lean Six Sigma process mapping?
- System, Input, Process, Output, Customer
- Supplier, Input, Process, Output, Customer (Correct answer)
- Schedule, Inspect, Plan, Operate, Control
- Supplier, Inventory, Plan, Output, Cost
Correct answer: Supplier, Input, Process, Output, Customer
SIPOC stands for Suppliers, Inputs, Process, Outputs, and Customers — a high-level map used in the Define phase to scope a process improvement project.
Question 4: Which statistical tool is used to study the relationship between two continuous variables?
- Pareto chart
- Scatter diagram (Correct answer)
- Control chart
- Check sheet
Correct answer: Scatter diagram
A scatter diagram plots two continuous variables against each other to visually identify potential correlations or relationships between them.
Question 5: What is 'Gemba' in Lean terminology?
- A type of waste reduction workshop
- The actual place where work is done (Correct answer)
- A performance measurement dashboard
- A supplier evaluation process
Correct answer: The actual place where work is done
Gemba is a Japanese term meaning 'the real place' — in Lean it refers to going to the actual location where work happens to observe and understand processes firsthand.
Question 6: In Lean Six Sigma, which type of data is described by categories or labels rather than numbers?
- Continuous data
- Variable data
- Attribute data (Correct answer)
- Interval data
Correct answer: Attribute data
Attribute data (also called discrete data) is categorized into groups such as pass/fail, defective/non-defective, or types of defects rather than measured on a continuous scale.
Question 7: Which Lean waste category involves people moving more than necessary to perform their work?
- Transportation
- Motion (Correct answer)
- Waiting
- Processing
Correct answer: Motion
Motion waste refers to unnecessary physical movement by people (walking, reaching, bending) required to perform a task, as distinguished from transportation which is the movement of materials.
Lean Six Sigma Yellow Belt Certification Trivia 5
Which Lean concept refers to leveling or smoothing the production schedule to avoid peaks and valleys in workload?