Lean Six Sigma Green Belt Certification Prep 4

Question 1

What is a 'Kaizen event' in Lean Six Sigma?

Accepted Answer

A focused, rapid improvement workshop typically lasting 3-5 days

Answer

A Kaizen event (also called a Kaizen blitz or rapid improvement event) is an intensive short-duration workshop where a cross-functional team implements improvements quickly.

Question 2

When a control chart shows a run of 8 consecutive points on one side of the centerline, this is called:

Accepted Answer

A special cause signal

Answer

Eight consecutive points on one side of the centerline is a classic Western Electric rule violation indicating a process shift — a special cause that requires investigation.

Question 3

What is the difference between 'precision' and 'accuracy' in measurement systems?

Accepted Answer

Accuracy is closeness to the true value; precision is consistency of repeated measurements

Answer

Accuracy (bias) refers to how close measurements are to the true value, while precision (repeatability) refers to how consistent repeated measurements are.

Question 4

A process yield is 95%. What is the First Pass Yield (FPY) for a three-step process where each step has 95% yield?

Accepted Answer

85.7%

Answer

FPY for multiple steps is calculated by multiplying individual step yields: 0.95 × 0.95 × 0.95 = 0.857 or approximately 85.7%.

Question 5

Which of the following is NOT one of the five principles of Lean thinking?

Accepted Answer

Eliminate defects to zero

Answer

The five Lean principles are: Identify Value, Map the Value Stream, Create Flow, Establish Pull, and Pursue Perfection — 'eliminate defects to zero' is not one of them.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Prep 4