Page 448 - Six Sigma Demystified

428 Six SigMa DemystifieD

84. An assembly process is receiving the incorrect pieces for assembly. To ensure that
only the correct pieces are sent, the parts tub is redesigned so that only the correct
pieces (at their correct number) can fit into the tub. This is an application of
A. kanban.
b. poka yoke.
c. visual factory.
d. 5S.

85. In evaluating an RPN,
A. a high number indicates high risk.
b. a high number indicates low risk.
c. a remote detection ability minimizes the RPN.
d. a high occurrence minimizes the RPN.

86. Which of the following experimental designs typically has the largest number of
replications?
A. Taguchi
b. Plackett-Burman
c. Response surface
d. EVOP

87. First-order models are often used
A. to determine optimal conditions for a process.
b. to narrow down a list of suspected factors influencing a process.
c. to emphatically prove which factors need to be controlled.
d. All the above are true.

88. If the fitted model is a good approximation to the data, then
A. the residuals will have a mean close to zero.
b. the residuals will have constant variance.
c. the residuals will be normally distributed.
d. All the above are true.

89. A good reason to begin with screening designs and a first-order model includes
A. fewer data are necessary, so time and money are saved.
b. over limited regions of interest, a first-order model is often a good
approximation.
c. we can often eliminate factors from the experiment.
d. All the above are true.

90. In a two-level experiment, when factor A is run at its high level, factor B at its low
level, and factor C at its high level,
A. interaction AB will be at its low level.
b. interaction AC will be at its low level.
c. interaction ABC will be at its middle level.
d. all the above are true.