Certified Six Sigma Black Belt Exam Assessment 3

Question 1

A Black Belt conducts a process risk assessment using FMEA. Which combination of RPN factors is used to prioritize failure modes?

Accepted Answer

Severity, Occurrence, Detection

Answer

RPN (Risk Priority Number) = Severity × Occurrence × Detection, with scores on a 1–10 scale for each factor.

Question 2

A measurement system assessment shows a discrimination ratio (DR) of 3. What does this indicate?

Accepted Answer

The gauge is inadequate; DR must be at least 5

Answer

A discrimination ratio below 5 indicates the gauge cannot adequately distinguish between parts; a DR ≥ 5 is the minimum acceptable threshold.

Question 3

Which assessment technique involves tracking a single unit or batch through an entire process to identify all value-added and non-value-added steps?

Accepted Answer

Value stream mapping

Answer

Value stream mapping documents every step, delay, and resource for a product or service family, categorizing each step as value-added or waste.

Question 4

A Six Sigma team is assessing whether a new process has a different mean than the historical mean of 50 units. The sample size is 30 and population variance is unknown. Which test is appropriate?

Accepted Answer

One-sample t-test

Answer

With unknown population variance and n=30, a one-sample t-test is used to compare a sample mean against a known historical value.

Question 5

During a process assessment, rolled throughput yield (RTY) is calculated across 4 sub-processes with yields of 95%, 92%, 97%, and 90%. What is the RTY?

Accepted Answer

76.4%

Answer

RTY = 0.95 × 0.92 × 0.97 × 0.90 ≈ 0.764, or approximately 76.4%.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Assessment 3