Lean Six Sigma Yellow Belt Certification Lean Concepts and Waste 4

Question 1

What does 'Muri' mean in the context of the three types of waste in Lean?

Accepted Answer

Overburden on people or machines

Answer

Muri refers to overburden — pushing workers or equipment beyond their natural capacity, leading to breakdowns and errors.

Question 2

Which waste category does rework of defective products fall into?

Accepted Answer

Both defects and extra processing

Answer

Rework represents defects (the item failed) and extra processing (additional work to correct the failure), capturing both waste types.

Question 3

A Lean practitioner performs a 'Gemba walk.' What is the primary purpose of this activity?

Accepted Answer

To go to the actual workplace and observe real processes to identify waste

Answer

A Gemba walk involves going to where work is done to observe processes firsthand and identify waste, problems, and improvement opportunities.

Question 4

Takt time is calculated as which of the following?

Accepted Answer

Available production time divided by customer demand rate

Answer

Takt time = available production time / customer demand, setting the pace at which products must be completed to meet demand.

Question 5

Which of the following best describes a 'value-added' activity in Lean?

Accepted Answer

An activity that transforms the product in a way the customer values and is willing to pay for

Answer

A value-added activity physically transforms the product or service in a way the customer recognizes and would pay for.

Lean Six Sigma Yellow Belt Certification Practice Test