Lean Six Sigma Yellow Belt Certification Prep 2

Question 1

In DMAIC, what is the primary deliverable of the Measure phase?

Accepted Answer

A validated measurement system and baseline process capability

Answer

The Measure phase establishes a reliable data collection system and quantifies the current baseline performance (Cp, Cpk, sigma level).

Question 2

A Yellow Belt team notices their process has a sigma level of 2.0. Approximately what percentage of outputs are defective?

Accepted Answer

4.5%

Answer

A 2-sigma process yields roughly 4.5% defects (308,537 DPMO), as each sigma level corresponds to a specific defect rate.

Question 3

Which tool is best used to display the relative frequency of defect categories in descending order?

Accepted Answer

Pareto chart

Answer

A Pareto chart ranks defect categories from most to least frequent, helping teams apply the 80/20 rule to focus improvement efforts.

Question 4

What does 'COPQ' stand for in Lean Six Sigma?

Accepted Answer

Cost of Poor Quality

Answer

COPQ (Cost of Poor Quality) includes all costs from defects: internal failures, external failures, appraisal, and prevention costs.

Question 5

A 'kaizen event' in Lean Six Sigma terminology refers to:

Accepted Answer

A focused, short-duration improvement workshop targeting a specific process

Answer

A kaizen event is an intensive team-based improvement workshop, typically lasting 3–5 days, focused on rapidly improving a targeted process.

Lean Six Sigma Yellow Belt Certification Practice Test