Lean Six Sigma Yellow Belt Certification Lean Six Sigma Yellow Belt Certification MCQ 4

Question 1

In Lean Six Sigma, 'Voice of the Customer' (VOC) data is most directly translated into measurable requirements using which tool?

Accepted Answer

Critical to Quality (CTQ) tree

Answer

A CTQ tree breaks down customer needs into specific, measurable quality characteristics that the process must deliver.

Question 2

Which DMAIC phase focuses on sustaining improvements and preventing the process from reverting to its old state?

Accepted Answer

Control

Answer

The Control phase implements control plans, monitoring systems, and documentation to hold the gains achieved in the Improve phase.

Question 3

A process produces 50 defects out of 1,000 opportunities. What is the defect rate expressed as DPMO?

Accepted Answer

50,000

Answer

DPMO = (Defects / Opportunities) × 1,000,000 = (50 / 1,000) × 1,000,000 = 50,000 DPMO.

Question 4

What is 'Poka-Yoke' in Lean Six Sigma?

Accepted Answer

An error-proofing technique that prevents or detects mistakes before they become defects

Answer

Poka-Yoke (mistake-proofing) designs processes or devices so that errors are impossible or immediately obvious.

Question 5

Which of the following sigma levels corresponds approximately to 99.99966% defect-free output?

Accepted Answer

6 Sigma

Answer

Six Sigma quality corresponds to 3.4 DPMO, meaning 99.99966% of all products are defect-free.

Lean Six Sigma Yellow Belt Certification Practice Test