CAD, Geospatial,3D and BIM Standards Converge
Mark Reichardt
President and CEO, Open
Geospatial Consortium, Inc.
mreichardt@opengeospatial.org
Not so long ago, telephone,printed pages,film, radio, TV, phonograph,photographs and computer data were quite separate media, each constrained by its own technical limitations.
Now, in many ways, these media
have converged, thanks to the flexibility
of digital technology and rapid
advances in CPUs, hard drives, networks,
and personal mobile devices.
Multimedia and multimode communication
dominates culture, commerce
and government.
In the geospatial industry, remote
sensing, photogrammetry, GIS, CAD,
AM/FM, navigation and spatial database
management were once considered
different vertical markets served
by different technology providers.
Now, there is an increasing desire - and
market pressure - for geospatial technologies
to converge. "Stovepipe" solutions
(self-contained systems that communicate
poorly with other systems) in
the geospatial industry are seen as the
legacy of the technologies' earlier
inherent or proprietary limitations.
In the next few years, this convergence
will have a major impact on professionals
involved with infrastructure
projects such as bridges and water systems.
Infrastructure design, construction,
and maintenance professionals
need to share information. Beginning
with the idea for a project and ending
with the demolition team - or perhaps
beyond that, with historians who will
preserve the memory of the project - it
is always the case that many people
and organizations create, store and
share information about a construction
project and its site and surrounding
geography.
In 2005, the European Commission's
European Construction Technology
Platform (ECTP) published a document
titled "Challenging and Changing
Europe's Built Environment - A vision
for a sustainable and competitive construction
sector by 2030". The report,
prepared by members of the construction
industry, states, "For Europe to face
its major technological, economic and
social challenges, we must be proactive
in understanding and communicating
within our sector.... An important task
is to turn the sector around to becoming
knowledge-based.... By improving
the construction process, we hope to
achieve reductions of up to 30% of lifecycle
costs, 50% of delivery time and
50% of work-related accidents."
In 2004, the US National Institute of
Standards and Technology (NIST) studied
efficiency losses in the planning,
design and construction of U.S. commercial
and institutional buildings and
industrial facilities. NIST found that, in
2002, the annual cost associated with
inadequate interoperability among
computer-aided design, engineering
and software systems in the US was
$15.8 billion. That's about 30% of overall
cost.
Another European Commission funded
project, the Open Information Environment
for Knowledge-Based Collaborative
Processes throughout the Lifecycle
of a Building (InPro) program, is one
of Europe's largest collaborative projects
in construction-related research
and development. The project is lead by
five large European construction contractors
in close cooperation with other
stakeholders of the construction and IT
industries, plus renowned research
organisations and specialized consultants.
The InPro website states, "The
main objective of InPro is to "develop
and establish a model-based and collaborative
way of working in the early
design phase, considering the whole
life-cycle of a building." And, "The construction
industry is standing before a
major technology shift - from the tradi-tional 2-dimensional drawings to 3-
dimensional Building Information
Models (BIM). Advanced design, communication
and simulation tools give
us an opportunity to change the way
we work in the industry, including
open collaboration between stakeholders,
design for increased energy efficiency,
flexibility, constructability,
comfort, etc."
ABOUT BIM
Though further research is important,
BIM is well beyond the early research
phase, and is coming into wide use. As
explained by Andrew Pressman, FAIA
in the Architectural Record, May 2007:
"This is an exciting time to practice
architecture. Architects and engineers
seem to be able to design and construct
almost anything they can imagine, and
the data they use enables these buildings
to be well managed by their owners.
Architects, consultants, and owners
are also working together more closely
than ever. Integrated practice (IP) is the
term that is being assigned to this collaborative
process. IP is a meaningful
response to the ongoing marketplace
mandate for buildings that are faster to
design and construct, at lower cost,
as well as more sustainable and of
higher quality than those built in
the past. Building information
modeling (BIM) is enabling - some say
forcing - this information-sharing, integrated-
practice culture to emerge."
[
http://archrecord.construction.com/practice/projDelivery/0705proj-1.asp]
A BIM is a shared knowledge resource
containing many different kinds of
information about a building, such as
site plan and imagery, CAD drawings,
connections to subsurface infrastructure,
building system and component
specifications, tenant information, and
building evacuation plans. BIM software
can be used to create drawings
and three-dimensional virtual models
of buildings as well as schedules, budget
estimates, and fabrication drawings.
The BIM approach increasingly
assumes Internet access to a wide variety
of data and software services.
FIGHTING WASTE
Integrated practice and BIM are an
industry response to waste. Globally,
Architecture, Engineering, Construction,
Owner and Operator (AECOO)
community faces challenges because
so many diverse players are involved
and because it is difficult to bridge their
different information systems. When a
plumbing contractor, for example, discovers
a design error that must be corrected
by changing a building's floor
plan, that change may impact other
subcontractors. Not uncommonly, the
effects of a change cascade wildly
through schedules and budgets, resulting
in substantial cost over-runs. With
BIM, change proposals can be reviewed
in terms of their implications, with
streamlined vetting by multiple participants,
potentially resulting in both
better planning and fewer and less
expensive mid-construction changes.
That study focused on AEC (architecture,
engineering and construction),
but the needs of owners and operators
also figure prominently in calculating
the potential value of BIM. A 2004
study of office buildings, undertaken
by the North American Continental
Automated Buildings Association
(CABA), found that over a 30-year period,
initial building costs account for
only two percent of total building costs,while operations and maintenance
costs equal six percent and personnel
costs equal 92 percent. (Fuller, S. and
S.R. Petersen. (1995). Life-Cycle Costing
Manual for the Federal Energy Management
Program. NIST Handbook 135.
National Institute of Standards and
Technology.)
Energy costs and materials costs
(which usually have a high "embedded
energy" component) have risen since
the time of that study (1995) and they
will surely continue to rise because of
supply and climate-mitigation constraints
on fossil fuels. Thus there is
high value in technology-assisted AEC
business process innovations that
reduce the percentage of wasted materials
and energy and that help architects
design for local climate and materials.
BIM is intended to optimize the
value of time spent by everyone
involved in the initial building phase,
optimize actual construction, and optimize
operational costs by helping
designers design buildings that require
minimal maintenance and minimal
inputs of energy and materials. This is
critical to the local and global social
imperative of sustainable prosperity.
LEVERAGING THE VALUE OF INFORMATION
The goal is not only to reduce waste,
but to increase the value of information.
The valued of information extends
well beyond its original purpose,
because, for almost any AEC or geospatial
information, there are many likely
or possible future uses as well as possible
immediate secondary uses. Building
information and geospatial information
can support campus, neighborhood
and broader urban planning
requirements; improve delivery of services;
assure adequate safety and security
procedures; expedite permitting,
plan line of sight communications,
optimize wayfinding, support transportation
and logistics, and improve
customer awareness of and access to
retail services.
Convergence of diverse information
technologies is necessary to analyze,
model, understand and deal with complex
and critical issues such as analyzing
emergency efficiency, air flow patterns
or evaluating the costs and benefits
associated with repurposing an older
building. Analysts need to consider
factors such as cost of future changes to
mechanical systems (plumbing, electrical,
HVAC etc.); projections of revenue
with or without renovations; occupancy
history and alternative marketing
scenarios; codes, permits and licensing;
and transportation and parking. All of
these are possible when "virtual design
and construction" can proceed with a
rich set of data inputs.