
2358.3 Traditional methods used in research and development
8.3.1 COMPLETELY RANDOMIZED DESIGN
The term completely randomized design (CRD) means that we determine the total
number of experimental units needed in the experimentation, and then select experi-
mental units randomly to be executed rst or last. Consider, for instance, that in litho-
graphic nanofabrication experimentation, an engineer would like to study the output
from using two levels of a chemical applied to three nanoparticle types and depos-
ited on four sizes of mould. Therefore, a total of 24 runs must be executed. This, in
turn, implies that the experimenter would have to make ...