Certified Six Sigma Black Belt Exam General 5

Question 1

What is the primary goal of the Control phase in DMAIC?

Accepted Answer

Sustain process gains and prevent reversion to old performance levels

Answer

The Control phase implements control plans, updated SOPs, and monitoring systems to ensure the process improvements are maintained long-term.

Question 2

A Black Belt uses a scatter plot and finds r = −0.92 between two variables. What does this indicate?

Accepted Answer

A strong negative linear relationship

Answer

A Pearson correlation coefficient of −0.92 indicates a strong negative linear relationship — as one variable increases, the other tends to decrease significantly.

Question 3

Which Lean waste category is represented when a machine operator waits for the previous step to complete before beginning their work?

Accepted Answer

Waiting

Answer

Waiting is one of the eight Lean wastes (DOWNTIME), describing idle time when people, equipment, or materials are not moving or being worked on.

Question 4

A team is deciding between two process improvement solutions. Using a Pugh Concept Selection Matrix, what serves as the datum?

Accepted Answer

The current process or a reference concept against which alternatives are compared

Answer

The datum in a Pugh Matrix is the baseline reference (often the current process) against which all alternative concepts are evaluated as better (+), worse (−), or same (S).

Question 5

In the context of Design for Six Sigma (DFSS), what does the DMADV roadmap stand for?

Accepted Answer

Define, Measure, Analyze, Design, Verify

Answer

DMADV stands for Define, Measure, Analyze, Design, Verify — a structured methodology used to design new products or processes to Six Sigma quality levels.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam General 5