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

Question 1

What is the primary purpose of a SIPOC diagram in the Define phase of a DMAIC project?

Accepted Answer

To provide a high-level overview of the process including suppliers, inputs, process steps, outputs, and customers

Answer

To calculate the sigma level of the current process

Answer

To identify the root cause of defects

Answer

To establish control limits for process monitoring

Question 2

In hypothesis testing, what does a Type II error represent?

Accepted Answer

Failing to reject a false null hypothesis

Answer

Rejecting a true null hypothesis

Answer

Accepting an alternative hypothesis correctly

Answer

Rejecting a false null hypothesis

Question 3

Which tool is most appropriate for identifying the vital few causes from the trivial many in a Six Sigma project?

Accepted Answer

Pareto chart

Answer

Control chart

Answer

Histogram

Answer

Run chart

Question 4

What does Cp measure in process capability analysis?

Accepted Answer

The potential capability of a process when centered between specification limits

Answer

The actual capability of a process accounting for centering

Answer

The long-term defect rate of a process

Answer

The short-term variation relative to the mean

Question 5

During the Analyze phase, a Black Belt discovers strong multicollinearity among predictor variables in a regression model. What is the most appropriate action?

Accepted Answer

Remove one or more correlated predictors or use principal component analysis

Answer

Increase the sample size to reduce the effect

Answer

Ignore it since it does not affect prediction accuracy

Answer

Switch to a non-parametric test

Question 6

What is the key difference between a cause-and-effect matrix and a Failure Mode and Effects Analysis (FMEA)?

Accepted Answer

A cause-and-effect matrix prioritizes inputs against outputs while FMEA evaluates risk using severity, occurrence, and detection ratings

Answer

A cause-and-effect matrix is used only in the Control phase while FMEA is used in Define

Answer

FMEA is a qualitative tool while the cause-and-effect matrix is purely quantitative

Answer

There is no difference; they are interchangeable tools