Lean Six Sigma Yellow Belt Certification General 3 — Questions and Answers
Question 1: What does the acronym TIMWOOD stand for in Lean?
- Types of inventory management work orders and deliveries
- The eight types of waste (Correct answer)
- Total inventory management with operational data
- Time, investment, materials, work, output, optimization, delivery
Correct answer: The eight types of waste
TIMWOOD is a mnemonic for the 8 Lean wastes: Transportation, Inventory, Motion, Waiting, Overproduction, Overprocessing, and Defects.
Question 2: In a Pareto Chart, what percentage of problems are typically caused by a vital few causes?
- 50%
- 80% (Correct answer)
- 95%
- 100%
Correct answer: 80%
The Pareto Principle (80/20 rule) states that roughly 80% of effects come from 20% of causes.
Question 3: What is a 'Kaizen Event'?
- A monthly quality audit
- A focused, short-duration team effort to improve a specific process (Correct answer)
- An annual performance review meeting
- A software tool for tracking defects
Correct answer: A focused, short-duration team effort to improve a specific process
A Kaizen Event is a rapid improvement workshop, typically lasting 3–5 days, focused on eliminating waste in a specific area.
Question 4: Which tool is used to visually display the steps in a process and identify where waste occurs?
- Histogram
- Value Stream Map (Correct answer)
- Control Chart
- Scatter Diagram
Correct answer: Value Stream Map
A Value Stream Map (VSM) illustrates material and information flow in a process, highlighting value-added and non-value-added steps.
Question 5: What is 'Takt Time' in Lean manufacturing?
- The fastest a machine can run
- The rate at which products must be completed to meet customer demand (Correct answer)
- The time to train a new operator
- Total available time minus break time
Correct answer: The rate at which products must be completed to meet customer demand
Takt Time is calculated by dividing available production time by customer demand rate, setting the production pace needed.
Question 6: What does 'Poka-Yoke' mean in the context of Lean Six Sigma?
- Continuous improvement through small steps
- A mistake-proofing technique to prevent errors (Correct answer)
- A visual management system for work areas
- A method for calculating defect rates
Correct answer: A mistake-proofing technique to prevent errors
Poka-Yoke (Japanese for 'mistake-proofing') refers to design features or mechanisms that prevent errors from occurring or being passed on.
Question 7: In the DMAIC model, during which phase would a team create a Project Charter?
- Measure
- Analyze
- Define (Correct answer)
- Control
Correct answer: Define
The Project Charter is created in the Define phase to formally scope the problem, goals, team, and timeline.
Lean Six Sigma Yellow Belt Certification General 3
What does the acronym TIMWOOD stand for in Lean?