aia tap building connections congress 2013 - state of bim standards
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AIA TAP: Building Connections CongressThere is no central BIM model...
Léon van Berlo
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199?: Birth of “the central model”
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Misconception (misinterpretation):
Shared data model is NOT equal to:
Shared BIM model instance
Shared data
Shared data model comes from the need to share/distribute data in a
standardized way…. “let’s agree to all do it like this”
shared data model == creating agreements (interoperability)
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huh…?
So why do we need a “central” model?
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Why a ‘central modelserver’?
Sharing large files (data)…
What information do you share?
Where does it come from?
Merging / synchronization
Revision management
Alerts/notifications
Knowing who to blame
Etc… Lots of good reasons, but you know why!
Could be just a useful gadget…
…. like shoes with build in music players.
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Ok, so which one should I choose?
Which one is best as a ‘central’ server?
Hu
h?
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source: Nour
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“There is no CENTRAL model”
(there are shoes with integrated music players)
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Proof?
Léon van BerloBuilding Connections Congress
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Denmark (June 2008):
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But ‘we’ (in the Netherlands) also know this...
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Our research:
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Our research:
NO ROUNDTRIP(import/export in a chain of tools)
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Conclusion:
The IFC data standard is stable and usable in an AEC collaboration environment
IFC meets the needs of the industry(as described in the paper)
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Other observations (skip this during presentation)
Users in the experiments in this research did not prefer a so-called
‘live synchronization’. The median of synchronization time of model
instances was 1 week (every Friday was a widely used practice).
In a homogeneous software environment, users felt that all team
members should have equal BIM software modeling expertise.
The use of a reference model concept with IFC can lower the
needed BIM competences for a project partner to be able to
collaborate in a way that is sufficiently effective for the entire project
team.
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Found conclusion:
Working in a ‘central’ modelserver (everybody the same tool)
has more downsides than advantages.
(ownership of objects, data overload, legal, change requests, etc...)
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Why do people still do it?
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Why do people still do it?
“It’s simple, easy and quick”“We just send/share everything we have”
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The real question (which is difficult):
What does the other person need to do his job?
What do I need to do my job?
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MVD
Model View Definitions
Are about defining the baseline to perform your job
Are about your core business…..
By the way: same goes for all the ‘ie’ standards!
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And when you know your job,
and you know what you need to do it……
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Léon van BerloBuilding Connections Congress
...you don’t need a central modelserver at all.
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There is no central BIM
twitter.com/berlotti
Léon van BerloBuilding Connections Congress