Lean Six Sigma Yellow Belt Certification General 2

Question 1

Which phase of DMAIC focuses on identifying the root cause of defects?

Accepted Answer

Analyze

Answer

The Analyze phase uses tools like fishbone diagrams and 5 Whys to identify root causes of defects.

Question 2

What does 'Sigma' measure in a Six Sigma process?

Accepted Answer

Process variation or standard deviation

Answer

Sigma (σ) is a statistical measure of variation or standard deviation from the mean in a process.

Question 3

A process operating at 6 Sigma has approximately how many defects per million opportunities (DPMO)?

Accepted Answer

3.4

Answer

A Six Sigma process produces only 3.4 defects per million opportunities, representing near-perfect quality.

Question 4

What is the primary purpose of a Control Chart in Lean Six Sigma?

Accepted Answer

To monitor process stability over time

Answer

Control charts display process data over time to detect unusual variation and determine if a process is in statistical control.

Question 5

Which of the following best describes 'Value-Added' activities in a Lean process?

Accepted Answer

Activities the customer is willing to pay for

Answer

Value-added activities are those that transform inputs in ways customers value and are willing to pay for.

Lean Six Sigma Yellow Belt Certification Practice Test