BIM - Generation Phase

I phase – Till early 1980s: Before 80’s design documents are
made traditionally by drawing lines to represent a building. These
documents like plan, section and elevation are the main source to
describe the building to be built. In these traditional drawings each
line meant to convey design so that a building can eventually be
constructed.

II phase – 1980s to Late 1990s: With the introduction of computers,
the major switch over started from manual drafting towards
the computer aided drafting, which helped in producing drawings
faster. As buildings became more complex, specialization in the
design and construction process emerged, which in turn lead to
more elaborate forms of information. Use of computers, especially
for 2D drawings and reports are revolutionary changes into
Architectural Documentation.

III phase – Beginning of the 2K: In the present day, buildings
involved in producing drawings are too large. With the growth
of technology, the building systems are also many. Today, buildings
have more security, electrical, HVAC (Heating, Ventilation,
and Air Conditioning), and energy requirement. Computer based
technology has been updated in order reduce errors, but in the
end, they are still collections of manually created, non-intelligent
lines and text.