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Many
industries
use
prototypes
to
try
out
specific
ideas;
prototyping
is
much
cheaper
than
full-scale
production.
Car
makers,
for
example,
may
build
many
different
prototypes
of
a
new
car
design.
Each
one
is
designed
to
test
a
specific
aspect
of
the
car
-
the
aerodynamics,
styling,
structural
characteristics,
and
so
on.
Old
school
folks
might
use
a
clay
model
for
wind
tunnel
testing,
maybe
a
balsa
wood
and
duct
tape
model
will
do
for
the
art
department,
and
so
on.
The
less
romantic
will
do
their
modeling
on
a
computer
screen
or
in
virtual
reality,
reducing
costs
even
further.
In
this
way,
risky
or
uncertain
elements
can
be
tried
out
without
committing
to
building
the
real
item.
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