Family of Scale Models/Prototypes
Mockup
Built
to
demonstrate
relations
of
adjacent
parts.
Built
to
scale;
need
not
work.
Working
Model
Built
to
illustrate
the
concept
functioning
--
especially
the
relative
motions
of
connected
moving
parts.
Not
always
to
full
scale;
probably
does
not
operate
optimally.
Engineering
Prototype
Built
to
demonstrate
important
design
parameters;
used
to
test
reliability,
speed,
accuracy,
etc.
Usually
hand
built;
often
full
scale;
durable
to
withstand
testing.
Production
Prototype
Built
to
illustrate
performance
requirements
met,
production
problems
resolved,
quality
control
achievable,
etc.
Built
as
like
the
mass
produced
item
as
possible,
differing
only
in
the
volume
level
of
production.