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Six Sigma LSSMBB Exam Practice Questions (P. 3)

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Question #21
A Black Belt is in the early stages of a problem solving effort. The Black Belt determines that the data gathered so far requires a DOE to gain additional insight and to understand which factors are important.
There are 8 factors and budget is limited. What type of experiment is most appropriate?
  1. A
    Full factorial
  2. B
    Fractional factorial
  3. C
    Response surface methodology
  4. D
    One factor at a time

Correct Answer:
B

Question #22
Following is a confounding pattern of a DOE:

A =BCD -

B =ACD -

C =ABD -

D =ABC -

AB=CD -

AC=BD -

AD = BC -
Based on this structure, what is the resolution of the design:
  1. A
    III
  2. B
    IV
  3. C
    V
  4. D
    None, it is a full factorial

Correct Answer:
B

Question #23
In a sequential experimentation strategy, RSM experiments are most likely to be conducted at which of the following phases?
  1. A
    As a follow-up experiment to earlier experiments to help find optimum settings or if curvature was detected
  2. B
    In the initial conjecture phase
  3. C
    After making confirmation runs, especially if an acceptable linear model with high R-squared has been obtained
  4. D
    As a first experiment before spending 25% of resources

Correct Answer:
A

Question #24
Which of the following best completes this statement? Factors are ___________ and responses are ____________.
  1. A
    Input variables, output variables
  2. B
    Output variables, input variables
  3. C
    Outputs, inputs
  4. D
    A and C only

Correct Answer:
A

Question #25
A Black Belt has run a full factorial experiment. The below image illustrates an interaction plot from the analysis. What level of interaction is there between these two factors?

  1. A
    No interaction
  2. B
    Strong interaction
  3. C
    Weak interaction
  4. D
    Three-way interaction

Correct Answer:
A

Question #26
Which experimental design has main effects confounded with second order interactions?
  1. A
    Resolution IV (Resolution 4)
  2. B
    Resolution V (Resolution 5)
  3. C
    Resolution III (Resolution 3)
  4. D
    Resolution II (Resolution 2)

Correct Answer:
C

Question #27
What is the recommended run order for an experiment?
  1. A
    Standard order
  2. B
    Random order
  3. C
    Center points last
  4. D
    It doesn't matter

Correct Answer:
B

Question #28
In a DOE analysis, residual plots are examined to accomplish which of the following?
  1. A
    Make precise predictions
  2. B
    Improve model fit
  3. C
    Determine which effects to keep in the model
  4. D
    Validate model assumptions

Correct Answer:
D

Question #29
A 3^2 experiment means that we are considering:
  1. A
    Two levels for three factors.
  2. B
    Two dependant variables and three independent variables.
  3. C
    Three levels of two factors.
  4. D
    Two continuous variables and three attribute variables.

Correct Answer:
C

Question #30
Which of the following is FALSE regarding FMEA?
  1. A
    The focus is reaction
  2. B
    Failure may or may not have occurred yet
  3. C
    It is initiated prior to any design activity
  4. D
    It is an assessment of potential failure modes

Correct Answer:
A

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