More than two decades into the building information modeling movement, AEC firms are still discovering ways to utilize BIM/VDC tools more effectively. One major current area of focus is how to cut waste in the BIM implementation process.
Inefficient virtual coordination meetings, cumbersome BIM files, and a “rush to model” mentality are just some of the profit-eating miscues that are commonplace in the AEC industry.
We reached out to several BIM/VDC power users for their top tips for eliminating waste in BIM/VDC workflows. Here’s what they said:
1. Recognize the importance of ‘tribal knowledge’
Many large, corporate AEC firms operate their BIM-driven projects like a manufacturing production line, with staff assigned to specific roles—design specialists, production experts, and construction administration specialists, all of whom move from project to project as they finish their piece of the BIM puzzle.
While efficient in theory, this Henry Fordish workflow model ultimately leads to waste and added costs, says Thom Chuparkoff, AIA, LEED AP, Associate with Populous. The problem, he says, lies in the turnover of staff during the transitions from design to documentation. At each transition, as certain staff members exit the project and others enter, the design team loses a bit of its “tribal knowledge”—its sense of knowing where a project came from and where it’s going, says Chuparkoff. Consistency of the team throughout the design and documentation phases is absolutely critical, he adds.
By employing basic process-mapping techniques at the outset of projects, Building Teams can reduce the amount of BIM modeling required on a project and develop models that offer increased value for the team and the client, says John Haymaker, PhD, AIA, LEED AP, Director of Research with Perkins+Will. Illustration: John Haymaker, Georgia Institute of Technology
“It’s troublesome to have, say, five people on the production team, none of whom had anything to do with the design,” says Chuparkoff. “They’re scratching their heads wondering why something was done the way it was. With construction schedules getting shorter, design teams don’t have time to go back and try to figure out what another team member was thinking.”
2. Master the art of the BIM coordination meeting
BIM/VDC tools are great, but if you can’t run efficient, productive coordination meetings, the Building Team will never realize the benefits of true BIM coordination. Gensler Project Architect and BIM/VDC expert Jared Krieger, AIA, LEED AP, recommends the following tips for making the most of virtual coordination meetings:
Practice and prepare. It takes skill to be able to navigate the project model and have the correct model views loaded and visibility settings adjusted for a meeting. Make the most of everyone’s time by allocating at least 15 minutes prior to each coordination meeting for one team member to load the model and specific views.
Assign a “designated driver,” someone who knows the model and is savvy about the software platform. Models can be cumbersome to navigate. Suffering through an inexperienced person trying desperately to steer the model will absolutely kill the momentum and productivity of the meeting.
“We often bypass conceptual 3D modeling software by encouraging the use of other mediums, such as clay and digital sketch models.”
—Thom Chuparkoff, AIA, LEED AP
Consider splitting meetings. Keep meetings focused on small components of the project, and include only the team members directly involved. Consider splitting meetings by profession. For example, meet with the structural engineer first to review structural-specific coordination. Then, have some overlap time with MEP and structural for common coordination. Finish the meeting with MEP coordination.
Use meeting notes to stay focused. Open action items and homework from the previous meeting should be the basis for discussion in your next meeting. Use this structure to keep your team on track, and resolve open coordination issues before moving on to new items.
3. Avoid double modeling whenever you can
Even with all the high-tech design and sketching tools available to designers, Chuparkoff advocates for a pen-and-paper approach to working with clients on early design concepts. He argues that firms allocate too much of their precious resources to creating overly complex 3D conceptual models, which then have to be painstakingly re-created in a BIM environment.
“At some firms, people will spend 40 hours or more building three different project models in SketchUp,” he says. “You don’t need three fully baked ideas, fully modeled, to present to the client. You need five or six good ideas, and not necessarily modeled. We often bypass conceptual 3D modeling software by encouraging the use of other mediums, such as clay and digital sketch models, early on to develop and refine ideas to the point where they can be modeled in BIM for the client one time. Before you get into the hard-line modeling, try to vet as much as you can the good old-fashioned way.”
4. Map your processes
AEC professionals have been trained to jump right in and start building the model. But this “rush to model” mentality often leads to inefficiencies, waste, and less-than-ideal models, says John Haymaker, PhD, AIA, LEED AP, Director of Research with Perkins+Will.
Haymaker, Assistant Professor of Architecture and Building Construction at Georgia Tech, recommends the use of process-mapping techniques—including value stream mapping and business process modeling—at the project outset to identify the decisions that need to be made during the design process, as well as the processes required to make those decisions. When done well, process mapping can help reduce the amount of BIM modeling required on a project and also lead to models that offer increased value for the team and the client, says Haymaker.
“For example, if an architect, mechanical engineer, and contractor can get together to map out their process for performing preliminary energy and cost analysis, the architect may realize that they only need to model spaces and exterior surfaces,” says Haymaker. “This would greatly simplify their modeling effort, and potentially eliminate useless or inaccurate data.”
5. Divvy up the model to avoid unwieldy file sizes
Four years into the Tysons Tower project in Tysons Corner, Va., Gensler’s Krieger has just one minor regret: not managing the size of the BIM file more effectively. “Our model is pretty big, and even with great computers, it can become a bit of a bear at times when all the pieces are loaded in,” he says.
Working with a central BIM model has its benefits—notably, having a single repository for all project information. But on large, complex projects, BIM files can become ponderous, resulting in longer load times during virtual coordination meetings.
Splitting the model into chunks is one approach to managing the file size. “We try to think of logical pieces to keep as separate models,” says Krieger. “For example, if you have a tall building with a podium, you can keep the tower and podium as separate models and reference them into each other as needed. Or, on a building project with a complicated skin, you can keep the curtain wall as a separate model. The earlier you plan the split the better.”
Krieger also advises Building Teams to take note of the file size of BIM object families used on projects. Complicated projects can incorporate more than a thousand families, and some sets can exceed 10 megabytes in size. “We are very careful about how complicated and large the families can get,” he says.
6. Make sure someone ‘owns’ your companywide BIM/VDC standard
Given the rapid pace of change and innovation in the BIM/VDC software industry, it is imperative that AEC firms designate an in-house power user to maintain and update the company BIM/VDC standard.
“These tools are constantly evolving, and the company standard needs to evolve with them,” says Adam Lasota, Junior Architect with Rietveld Architects, New York. “Newer functions and features can make company standards obsolete, so it’s a matter of productivity.”
7. Create a simple BIM execution plan—and stick to it
Setting expectations and staying organized can be addressed through a simple, straightforward BIM execution plan that covers everything from schedule and roles to model sharing and level of development.
“It’s absolutely worth the effort,” says Gensler’s Krieger, referring to the firm’s work setting up an execution plan for Tysons Tower. “All the time we spent setting up views, sheet templates, and detail organization in the beginning is paying off in the construction administration process.”
When in the thick of a large, multi-year project, it’s easy for a team to stray from the original BIM execution plan. Fight that urge, because doing so can save thousands, perhaps millions, of dollars in avoided costs during construction.
“The biggest payoff has come from our team’s early commitment to have weekly BIM coordination sessions throughout the design process,” says Krieger. “It has resulted in a low number of RFIs and very few significant field coordination issues.”
Related Stories
| Aug 11, 2010
Best AEC Firms to Work For
2006 FreemanWhite Hnedak Bobo Group McCarthy Building Companies, Inc. Shawmut Design and Construction Walter P Moore 2007 Anshen+Allen Arup Bovis Lend Lease Cannon Design Jones Lang LaSalle Perkins+Will SmithGroup SSOE, Inc. Timothy Haahs & Associates, Inc. 2008 Gilbane Building Co. HDR KJWW Engineering Consultants Lord, Aeck & Sargent Mark G.
| Aug 11, 2010
High-Performance Workplaces
Building Teams around the world are finding that the workplace is changing radically, leading owners and tenants to reinvent corporate office buildings to compete more effectively on a global scale. The good news is that this means more renovation and reconstruction work at a time when new construction has stalled to a dribble.
| Aug 11, 2010
Great Solutions: Business Management
22. Commercial Properties Repositioned for University USE Tocci Building Companies is finding success in repositioning commercial properties for university use, and it expects the trend to continue. The firm's Capital Cove project in Providence, R.I., for instance, was originally designed by Elkus Manfredi (with design continued by HDS Architects) to be a mixed-use complex with private, market-...
| Aug 11, 2010
Nurturing the Community
The best seat in the house at the new Seahawks Stadium in Seattle isn't on the 50-yard line. It's in the southeast corner, at the very top of the upper bowl. "From there you have a corner-to-corner view of the field and an inspiring grasp of the surrounding city," says Kelly Kerns, project leader with architect/engineer Ellerbe Becket, Kansas City, Mo.
| Aug 11, 2010
AIA Course: Historic Masonry — Restoration and Renovation
Historic restoration and preservation efforts are accelerating throughout the U.S., thanks in part to available tax credits, awards programs, and green building trends. While these projects entail many different building components and systems, façade restoration—as the public face of these older structures—is a key focus. Earn 1.0 AIA learning unit by taking this free course from Building Design+Construction.
| Aug 11, 2010
BIM adoption tops 80% among the nation's largest AEC firms, according to BD+C's Giants 300 survey
The nation's largest architecture, engineering, and construction companies are on the BIM bandwagon in a big way, according to Building Design+Construction's premier Top 50 BIM Adopters ranking, published as part of the 2009 Giants 300 survey. Of the 320 AEC firms that participated in Giants survey, 83% report having at least one BIM seat license in house, half have more than 30 seats, and near...
| Aug 11, 2010
World's tallest all-wood residential structure opens in London
At nine stories, the Stadthaus apartment complex in East London is the world’s tallest residential structure constructed entirely in timber and one of the tallest all-wood buildings on the planet. The tower’s structural system consists of cross-laminated timber (CLT) panels pieced together to form load-bearing walls and floors. Even the elevator and stair shafts are constructed of prefabricated CLT.
| Aug 11, 2010
Integrated Project Delivery builds a brave, new BIM world
Three-dimensional information, such as that provided by building information modeling, allows all members of the Building Team to visualize the many components of a project and how they work together. BIM and other 3D tools convey the idea and intent of the designer to the entire Building Team and lay the groundwork for integrated project delivery.
| Aug 11, 2010
Great Solutions: Healthcare
11. Operating Room-Integrated MRI will Help Neurosurgeons Get it Right the First Time A major limitation of traditional brain cancer surgery is the lack of scanning capability in the operating room. Neurosurgeons do their best to visually identify and remove the cancerous tissue, but only an MRI scan will confirm if the operation was a complete success or not.
| Aug 11, 2010
Great Solutions: Collaboration
9. HOK Takes Videoconferencing to A New Level with its Advanced Collaboration Rooms To help foster collaboration among its 2,212 employees while cutting travel time, expenses, and carbon emissions traveling between its 24 office locations, HOK is fitting out its major offices with prototype videoconferencing rooms that are like no other in the U.