Lean Six Sigma Black Belt Certification FREE Lean Six Sigma Black Belt Improve Phase: DOE Questions and Answers 2

Question 1

In a 2^3 full factorial design, how many experimental runs are required without replication?

Accepted Answer

8

Answer

6

Answer

9

Answer

12

Question 2

What is the primary purpose of randomization in a designed experiment?

Accepted Answer

To minimize the effect of uncontrolled variables

Answer

To reduce the number of runs needed

Answer

To eliminate the need for replication

Answer

To simplify the analysis of results

Question 3

Which term describes the combined effect of two factors that cannot be explained by either factor alone?

Accepted Answer

Interaction effect

Answer

Confounding

Answer

Blocking effect

Answer

Main effect

Question 4

In a fractional factorial design, what is the consequence of using a lower resolution (e.g., Resolution III)?

Accepted Answer

Main effects are confounded with two-factor interactions

Answer

All interactions can be estimated independently

Answer

The experiment requires more runs than a full factorial

Answer

Blocking is no longer possible

Question 5

What does the term 'center point' refer to in a DOE context?

Accepted Answer

A run conducted at the midpoint of all factor levels

Answer

The median value of the response variable

Answer

The average of all experimental results

Answer

The optimal factor setting identified by the experiment

Question 6

A Black Belt wants to screen seven factors efficiently. Which design is most appropriate?

Accepted Answer

Plackett-Burman design

Answer

Full factorial 2^7

Answer

Central composite design

Answer

Box-Behnken design