Lean Six Sigma Black Belt Certification Basic Lean Six Sigma Black Belt Certification 1

Question 1

In a Six Sigma project, Defects Per Million Opportunities (DPMO) is calculated as which of the following?

Accepted Answer

(Defects / Opportunities) × 1,000,000

Answer

DPMO = (Number of Defects / Number of Opportunities) × 1,000,000. This normalizes the defect rate to a per-million scale, allowing comparison across processes with different opportunity counts.

Question 2

Which type of control chart is most appropriate for monitoring the proportion of defective items in subgroups of varying size?

Accepted Answer

p-chart

Answer

The p-chart monitors the proportion (fraction) of defective units and accommodates varying subgroup sizes, making it the correct choice when sample sizes differ across inspection periods.

Question 3

In Design of Experiments (DOE), what is the purpose of replication?

Accepted Answer

To estimate experimental error and increase statistical power

Answer

Replication involves running the same experimental conditions more than once. This allows estimation of pure experimental error and increases statistical power, making effects easier to detect reliably.

Question 4

In a Failure Mode and Effects Analysis (FMEA), the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detection

Answer

RPN = Severity × Occurrence × Detection. Each factor is rated on a scale (typically 1–10) and multiplied together to prioritize failure modes that require corrective action.

Question 5

Which Lean tool is used to create a visual representation of the flow of materials and information required to bring a product from raw material to the customer?

Accepted Answer

Value Stream Map

Answer

Value Stream Mapping (VSM) documents all steps — both value-added and non-value-added — in the flow of materials and information, making waste and improvement opportunities visible across the entire process.

Lean Six Sigma Black Belt Certification Practice Test

Lean Six Sigma Black Belt Certification Practice Test

Lean Six Sigma Black Belt Certification Basic Lean Six Sigma Black Belt Certification 1