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Even more complicated is the
situation where the owner or
user of the building does not own
the as built project, so before
creating a digital twin, it is necessary
to perform a building observation,
which requires a lot of
manual and not so intellectual
work.
Finally, there is the possibility of
laser scanning of an existing
object. Still, the purpose of the
generated point-cloud 3D model
of a digital twin of an existing
building is highly questionable
from a BIM point of view.
to define the costs of maintaining
a digital twin model. In most
cases, the item in the
maintenance contract involves
paying by the facility user after an
intervention order is issued,
which is a less favorable option
for the user. The second most
common option is the annual
subscription of the facility user to
a company that is contractually
obliged to update the model and
document any changes to the
digital twin model after each
order and intervention.
Creating Of The
Digital Twin Of The
Building
To understand how digital twin
data of the building is managed, I
must indicate to you that the
methodology for generating data
is not the same for the digital
twin that is the subject of the
project and the digital twin that is
generated based on data from
the as built project if the owner
or user of the building has it.
Let’s consider these four cases:
• The digital twin model generated
during the BIM workflow is
essentially a model generated
after the building construction
and can be considered as an as
built project. As I mentioned in
the previous article, if the investor
adequately hired his BIM
manager, who constantly
checked the coordination of the
constructed building with the
digital as built model, it can be
said that with certain, not so large
additional works on the digital as
built model, the investor can
easily have the digital twin model;
• Digital twin model generated
from the as built project using 2D
drawings and additional project
documentation is a far more
complicated case since it requires
a lot of BIM modeling, assigning
adequate parameters to the
elements in the digital twin and
linking those parameters to a
database that documents all
future repairs and works on the
facility. I must mention that the
040 TeamCAD BIM
JAN 2021