Lean Six Sigma Black Belt Certification Basic Lean Six Sigma Black Belt Certification 1

Question 1

In a Six Sigma project, Defects Per Million Opportunities (DPMO) is calculated as which of the following?

Accepted Answer

(Defects / Opportunities) × 1,000,000

Answer

(Defects / Units) × 1,000,000

Answer

(Defects × Opportunities) / Units

Answer

(Units / Defects) × 1,000,000

Question 2

Which type of control chart is most appropriate for monitoring the proportion of defective items in subgroups of varying size?

Accepted Answer

p-chart

Answer

X-bar and R chart

Answer

c-chart

Answer

I-MR chart

Question 3

In Design of Experiments (DOE), what is the purpose of replication?

Accepted Answer

To estimate experimental error and increase statistical power

Answer

To reduce the number of experimental runs required

Answer

To randomize the order of experimental runs

Answer

To ensure all factors are tested at the same level

Question 4

In a Failure Mode and Effects Analysis (FMEA), the Risk Priority Number (RPN) is calculated as:

Accepted Answer

Severity × Occurrence × Detection

Answer

Severity + Occurrence + Detection

Answer

Severity × Occurrence / Detection

Answer

(Severity + Detection) × Occurrence

Question 5

Which Lean tool is used to create a visual representation of the flow of materials and information required to bring a product from raw material to the customer?

Accepted Answer

Value Stream Map

Answer

5S methodology

Answer

Kanban board

Answer

Spaghetti diagram

Question 6

In hypothesis testing, a p-value of 0.03 with a significance level (α) of 0.05 leads to which conclusion?

Accepted Answer

Reject the null hypothesis because p < α

Answer

Fail to reject the null hypothesis because p > α

Answer

Accept the null hypothesis because the difference is small

Answer

Increase the sample size before drawing any conclusion