Lean Six Sigma Green Belt Certification Lean Principles and Waste 2

Question 1

A Green Belt notices technicians walking long distances between workstations to retrieve tools. Which type of waste does this represent?

Accepted Answer

Motion

Answer

Motion waste refers to unnecessary movement of people, such as walking to retrieve tools that should be located at the point of use.

Question 2

Which Lean principle is most directly associated with producing only what the customer needs, when they need it?

Accepted Answer

Pull system

Answer

A pull system produces goods only in response to actual customer demand, preventing overproduction and excess inventory.

Question 3

In the TIMWOOD acronym for the 8 wastes, what does the second 'O' stand for?

Accepted Answer

Over-processing

Answer

In TIMWOOD (Transportation, Inventory, Motion, Waiting, Over-processing, Overproduction, Defects), the second O stands for Over-processing.

Question 4

A company produces reports that are never read by any stakeholder. Which category of waste best describes this activity?

Accepted Answer

Overproduction

Answer

Producing reports no one uses is overproduction — creating output beyond what the customer (stakeholder) needs or requests.

Question 5

Which Lean concept categorizes activities as value-added, non-value-added but necessary, or pure waste?

Accepted Answer

Value stream analysis

Answer

Value stream analysis categorizes every process step into value-added, necessary non-value-added, or waste to identify improvement opportunities.

Lean Six Sigma Green Belt Certification Practice Test