Certified Six Sigma Black Belt Exam Certified Six Sigma Black Belt Basic 1

Question 1

Which tool is used to prioritize potential causes of a problem by separating the 'vital few' from the 'trivial many'?

Accepted Answer

Pareto chart

Answer

A Pareto chart applies the 80/20 rule to rank causes by frequency or impact, allowing teams to focus improvement efforts on the few causes responsible for most of the problem.

Question 2

In the DMAIC methodology, during which phase would a team establish baseline process performance metrics?

Accepted Answer

Measure

Answer

The Measure phase is dedicated to collecting data and establishing the current baseline performance of the process before any improvements are made, providing a foundation for comparison.

Question 3

What does a p-value less than 0.05 indicate in hypothesis testing?

Accepted Answer

The result is statistically significant and the null hypothesis is rejected

Answer

A p-value below the significance level (typically 0.05) means the probability of observing the results by chance is very low, providing sufficient evidence to reject the null hypothesis.

Question 4

Which type of variation in a control chart is caused by identifiable, non-random sources such as equipment failure or operator error?

Accepted Answer

Special cause variation

Answer

Special cause variation (also called assignable cause variation) stems from specific, identifiable factors outside the normal process and is indicated by points beyond control limits or non-random patterns.

Question 5

What is the primary purpose of a Measurement System Analysis (MSA) in Six Sigma?

Accepted Answer

To evaluate the accuracy and reliability of the measurement system itself

Answer

MSA (commonly conducted as a Gauge R&R study) assesses whether the measurement system introduces unacceptable variation, ensuring that data collected actually reflects true process performance rather than measurement error.

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Practice Test

Certified Six Sigma Black Belt Exam Certified Six Sigma Black Belt Basic 1