Certified Six Sigma Black Belt Exam Free Certified Six Sigma Black Belt MCQ Questions and Answers 3

Question 1

During the Control phase, a Black Belt needs to monitor both the process mean and variability simultaneously. Which control chart combination should be used for subgroup sizes of 5?

Accepted Answer

X-bar and R chart

Answer

X-bar and R charts are the standard combination for monitoring the mean and range of a process when subgroup sizes are between 2 and 10.

Question 2

In Design of Experiments (DOE), what is the primary advantage of a fractional factorial design over a full factorial design?

Accepted Answer

It requires fewer experimental runs while still estimating main effects

Answer

Fractional factorial designs reduce the number of runs needed by confounding higher-order interactions, allowing efficient screening of main effects.

Question 3

A process has a defect rate of 3,400 DPMO. What is the approximate sigma level of this process?

Accepted Answer

4.0 sigma

Answer

A DPMO of 3,400 corresponds to approximately a 4.0 sigma process level when including the standard 1.5 sigma shift.

Question 4

Which tool is used in the Analyze phase to identify the vital few factors from the trivial many?

Accepted Answer

Pareto chart

Answer

The Pareto chart applies the 80/20 rule to visually separate the vital few causes that account for most of the problem from the trivial many.

Question 5

What is the purpose of a tollgate review in the DMAIC methodology?

Accepted Answer

To formally evaluate whether a phase's deliverables are complete before moving to the next phase

Answer

Tollgate reviews are formal checkpoints at the end of each DMAIC phase to verify that all required deliverables are complete and the project is ready to advance.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Free Certified Six Sigma Black Belt MCQ Questions and Answers 3