MBBLSS

Daniel Kevins

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Question 1:What’s the benefit of using a
Plackett-Burman screening design over a design R_III?

	A	A Plackett-Burman uses a geometric design and can be folded over for sequential experimentation
	B	The Plackett-Burman grows in factors of 4 vs. exponentially
	C	The Plackett-Burman does not alias the main effects to two-way interactions
	D	Both B and C
	E	All of the above

Question 2:Quality through inspection
has a clearly defined responsibility.

	A	True
	B	False

Question 3:When designing a screening experiment, what’s the benefit of
using a design R_IVover a R_III?

	A	A design R_IVhas main effects aliased with three-way interactions which rarely occur, whereas R_IIIhas main effects aliased with two-way interactions which occur frequently
	B	You can fold over a design R_IVas opposed to a design R_IIIthat you can not fold over
	C	A design R_IVhas fewer runs that a R_III
	D	All of the above

Question 4:A mixture design is easily
identifiable because

	A	All the levels have to sum to the same constant
	B	Each factor has a different number of levels
	C	The design space creates a polyothogram
	D	All of the above

Question 5:What is a blocking factor?

	A	A factor not under consideration for the test but must vary and may contribute significantly to the experiment’s variation
	B	A factor under consideration for a test but whose variation is considered insignificant
	C	A blocking factor is another name for a latent potential variable
	D	None of the above

Question 6:Costs incurred when the
company finds a defect before shipment are:

	A	Prevention costs
	B	Appraisal costs
	C	Internal failure costs
	D	External failure costs

Question 7:The Cost of Quality Report shows:

	A	Costs by category for the current and prior periods
	B	Percent of change from the prior period
	C	Current period budget
	D	Percent of change from the budget
	E	All of the above

Question 8:If you are conducting a
two-level experiment and wish to perform a few runs at the center point
to
detect any curvature and obtain your experimental error, what are some
of the negatives of using this approach?

	A	You do not know which factor, or factors, contribute to the curvature if it exists
	B	By using the center points as your experimental error in lieu of a replicate, you will not be able to detect if a factor causes a variance shift
	C	By using center points, your design is no longer balanced and it loses its orthogonality
	D	All of the above
	E	Both A and B

Question 9:The easiest way to handle
mixture is to

	A	Use the Simplex-Lattice design
	B	Use the Simplex-Centroid design
	C	Use the standard matrix design
	D	Convert them to ratios

Question 10:The design portion of your
experiment should take about 50% or more of the time.

	A	True
	B	False

Question 11:What are some of the benefits
of using Gray Coding in experiments?

	A	It provides an orthogonal design
	B	Only one factor changes at a time
	C	It randomizes the experiment
	D	It reduces the number of runs while keeping the resolution high

Question 12:The new philosophy for
quality is:

	A	Quality through detection
	B	Quality through prevention
	C	Quality is management’s responsibility
	D	Both b and c

Question 13:One advantage of a
Box-Behnken design is

	A	It’s an orthogonal design
	B	It doesn’t utilize the corner points and has no axials
	C	You can use sequential experimentation
	D	It’s the most efficient design with a large number of factors

Question 14:If you do not block on a
significant factor, what happens to the
factor’s effect?

	A	Nothing, since it not included in the experiment
	B	The effect is spread evenly throughout the design by randomizing the experiment
	C	The effect is present in the error term and makes it difficult to detect valid terms in the experiment
	D	None of the above

Question 15:Having a good business case
with a return on investment and a well-thought-out experimental design
is the best way to gain management support for your experiment.

	A	True
	B	False

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Daniel Kevins

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