Lean Six Sigma Black Belt Certification FREE Lean Six Sigma Black Belt Certification Questions and Answers 2

Question 1

Which statistical test is most appropriate for comparing the means of three or more groups in a Lean Six Sigma project?

Accepted Answer

ANOVA

Answer

ANOVA (Analysis of Variance) is designed to compare means across three or more groups to determine if at least one group differs significantly.

Question 2

In a control chart, what does a point beyond the Upper Control Limit (UCL) indicate?

Accepted Answer

A special cause of variation is present

Answer

A point beyond the control limits signals special cause variation, meaning an assignable factor is influencing the process beyond normal random variation.

Question 3

What is the primary purpose of a Failure Modes and Effects Analysis (FMEA) in a Black Belt project?

Accepted Answer

To prioritize risks based on severity, occurrence, and detection

Answer

FMEA systematically evaluates potential failure modes and prioritizes them using a Risk Priority Number calculated from severity, occurrence, and detection ratings.

Question 4

A Black Belt discovers that a critical X variable has a non-normal distribution. Which approach should be used to establish process capability?

Accepted Answer

Use a Box-Cox transformation or non-normal capability analysis

Answer

When data is non-normal, a Box-Cox transformation or non-normal capability methods provide accurate capability indices that reflect the true process behavior.

Question 5

During the Improve phase, a Black Belt uses a 2^4 full factorial Design of Experiments. How many experimental runs are required without replication?

Accepted Answer

16

Answer

A 2^4 full factorial design requires 2 raised to the 4th power, which equals 16 experimental runs to test all combinations of four factors at two levels.

Lean Six Sigma Black Belt Certification Practice Test

Lean Six Sigma Black Belt Certification Practice Test

Lean Six Sigma Black Belt Certification FREE Lean Six Sigma Black Belt Certification Questions and Answers 2