AIA BIM Protocol E202

1 AIA BIM Protocol (E202)
http://www.allthingsbim.com/2008/12/aia-bim-protocol-e202.html acesso em 25/02/2013
Despite my recent ranting (aka constructive crticism) about the AIA's communication practices, I
would like to discuss one of their newest contract documents - AIA E202-2008: Building
Information Modeling Protocol Exhibit. As recently discussed by Jim Bedrick (Webcor Builders)
in a featured article on AECBytes.com titled "Organizing the Development of a Building
Information Model," the BIM Protocol has evolved from work initiated by Vico Software and Mr.
Bedrick which was subsequently presented to the AIA's Integrated Project Delivery (IPD) Task
Force. This document takes an important step towards the effective downstream use of BIM
data by a project team. A free sample can be obtained from the AIA
at www.aiacontractdocuments.org.
In a previous post, I had discussed the use of disclaimers for added protection from liability
when sharing native design data with team members outside of the Design Team. To make the
next logical step - from "little BIM" to "BIG BIM" - I have been conducting discussions with my
colleagues, peers and our firm's legal counsel about ways to start "chipping away" at the shield
(disclaimer) in an effort to establish usable and controllable channels of BIM data. To that end,
the AIA has released E202 to address the issue of integrating BIM data into the contractual
environment. It begins with the general "protocol" in which project teams can define procedural
details such as Model Management, Model Ownership and Coordination & Conflicts. While
these areas are important to define, the key part of E202 is the definition of two fundamental
concepts: Level of Development (LOD) and the Model Element Author (MEA). These two
categories are then combined in a matrix for each phase of the project, corresponding to model
element assemblies in the Model Element Table described in greater detail below.
2 LEVEL OF DEVELOPMENT
There are 5 basic levels of development which do not reflect specific modeling guidelines for
any particular software, rather a generic definition of model content and, more
importantly, authorized usesof the model for the respective LOD:
LOD 100 - Essentially the equivalent
of conceptual design, the model
would consist of overall building
massing and the downstream users
are authorized to perform whole
building types of analysis (volume,
building orientation, cost per square
foot, etc.)
LOD 200 - Similar to schematic
design or design development, the
model would consist of "generalized
systems or assemblies with
approximate quantities, size, shape,
location and orientation."
Authorized uses would include
"analysis of selected systems by
application of generalized
performance criteria."
LOD 300 - Model elements are
suitable for the generation of
traditional construction
documentsand shop drawings. As
such, analysis and simulation is
authorized for detailed elements and
systems.
LOD 400 - This level of

development is considered to be
suitable for fabrication and
assembly. The MEA for this LOD is
most likely to be the trade contractor
or fabricator as it is usually outside
the scope of the architect's or
engineer's services or would
constitute severe risk exposure if
Image courtesy of Mortenson Construction
such parties are not adequately
insured.
LOD 500 - The final level of
development represents the project
as it has been constructed - the as-
built conditions. The model is
suitable for maintenance and
operations of the facility.
Note that the above descriptions are merely excerpts from the original AIA E202 document.
Refer to the free sample available from AIA's Contract Documents website for complete details.
3 MEA'S AND THE MODEL ELEMENT TABLE
Quite simply, the Model Element Authors (MEA's) are the parties responsible for developing the
model content as specified in the Model Element Table. The Levels of Development are paired
with an assigned MEA for each major building assembly as shown in a filled-out sample below:
4 CONCLUSION
The AIA E202 Building Information Modeling Protocol Exhibit is a compelling tool for use in the
evolving world of virtual design and construction teams. I have had many conversations with
my BIM Specialists as well as project team leaders using it as a basis for development of BIM
Management Plans; however, it has not yet become a formal addendum to any of our project
contracts. That will likely change very soon.
The AIA Document E202 is a copyright of The American Institute of Architects and is protected
by U.S. Copyright Law and International Treaties.
Posted by James Van at 9:56 AM

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1 AIA BIM Protocol (E202)

http://www.allthingsbim.com/2008/12/aia-bim-protocol-e202.html acesso em 25/02/2013

LOD 400 - This level of

3 MEA'S AND THE MODEL ELEMENT TABLE

Posted by James Van at 9:56 AM

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