7 Reasons Why Transitioning to BIM Makes Sense for Small Firms
The benefits and capabilities of building information modeling in large-scale architectural practices are well known. But is BIM really necessary for smaller firms? Many small firms have been operating using traditional CAD methods for some time now, and switching technologies can seem a daunting task, especially for companies that operate on small budgets and without the specialized personnel of large international firms. But this is 2016 and the economic landscape has changed, with more and more expected from architects all the time. Time is more valuable now than ever. Where BIM software programs were once seen as simply nice to have, their large range of benefits have now made BIM an essential part of the design process. And as the following reasons show, BIM is just as important a tool for small offices as it is for larger ones.
Reason 1: Wow Factor
BIM is such an obvious solution for large projects, as it allows architects, consultants and contractors to work using the same information, that large-scale developers have begun to expect 3D models and multiple perspectives for every project. But many clients that small firms often work with are less familiar with BIM—or even the design process in general. Davey McEathron of Davey McEathron Architecture explains:
“The efficiencies that are built into a BIM program are one of the things we tout when we are in front of a client trying to win that business. When you show a client a 3D model and start spinning it around, it kind of blows their mind.”
Harnessing BIM technology when pitching to clients instills confidence in your work, while exciting them with an accurate visualization of how their project will look.
Reason 2: Shorten Feedback Loops, Save Time
CAD is a drafting program, not a responsive modeling program. This means that when changes need to be made to a drawing set, the architect must go through each drawing to make updates, taking valuable time and increasing the probability of user error. BIM software recognizes changes three-dimensionally, and will update all drawings at the same time, allowing architects to focus on more important duties.
Reason 3: Avoid Outsourcing
For competitions and important projects, computer renderings are an obligatory tool in attracting a client’s attention. Without BIM, creating these images is a headache that many small firms prefer to outsource rather than produce in-house. Yet outsourcing can be expensive, and any miscommunication could result in an imperfect product.
As Geoffrey Tears of Mohle Design explains, it can be difficult to compete when you “have to outsource to get things rendered, versus the bigger firms who are actually making these 3D models and producing information as they go.”
Reason 4: BIM is the Future
While it’s possible today to operate without BIM, widespread adoption and government BIM mandates have made BIM the global industry standard. New productivity updates for BIM programs continue to increase the software’s capabilities, further widening the gap between old and new ways of practicing. Meanwhile, architects will need to keep up with their clients, who will continue to demand more descriptive models and images, expect competency in modern technology, and will be less willing to pay for the hours needed to update drawing sets. Firms using only CAD software may find themselves at a disadvantage.
Reason 5: BIM Can Help Market Your Firm
Image is everything. Attracting new clients means having to tout your firm’s abilities and accomplishments. BIM can help create both the images and the documents needed. “It’s provided us a really fast tool for marketing,” said Tears, “in that we can set up all of our necessary drawings and renderings, or go through and set up a whole new document of purely marketing packages, so that we’ve done all our graphic design in Revit.”
Reason 6: Build Trust and Secure Repeat Clients
The most important thing for most clients is that a project is completed in a timely manner and for around the expected budget. If an architect is able to deliver those things, the client will be more likely to use their services again in future developments. BIM allows architects to more easily create precise, correct construction documents and thus more accurately predict costs.
For Vanessa Bizzell of Bluemouse LTD, making clients happy is about mitigating risk. “Because we’re building in 3D, I have the confidence that the work I put in Autodesk Revit LT will work when we build, and that any problems are sorted out before we get on site. I know my clients don’t always have that confidence; [working with other architects] they have to use contingency plans. But I couldn’t justify taking the risk for them.”
Reason 7: Compete with Larger Firms
Small firms often find themselves competing with much larger firms to win a project. To compete successfully in these situations, small firms need to start on a level playing field. Using BIM software allows fewer people to do a lot more in less time, while demonstrating to the client that despite your smaller size, you’re just as sophisticated as the larger practices they may be considering. Once your drawings sets are in equal standing with your competitors, the actual designs will shine through.
Tears explains how not having BIM can hurt smaller firms:
“One of the big issues for us in getting those bigger jobs — as well as just competing for those jobs — was that it was tougher for our firm to show up with just 2D drawings and space plans and elevations, compared to some of those bigger firms that were competing for the same jobs and would have renderings and walkthroughs. Any bit of information that they needed to take out, they had.”
In our fast-paced world, time is the most valuable asset for an architecture firm. BIM cuts out needless time-wasting work, allowing firms to get the most out of their projects—regardless of size.
Building Information Modeling is More than Software
It is 2018, and it should be clear to everyone in the AEC industry that BIM is the future of building, infrastructure design, construction, and maintenance. There are millions of marketing dollars spent by BIM software companies each year trying to convince you that Building Information Modeling can’t happen without their product. They will try to convince you that their product is the “real BIM.” Of course, we live in an open, capitalist society where this behavior is expected. However, if you and your firm are making the move to BIM, this background noise may be concerning… and if it’s not, it should be.
In the first paragraph of Wikipedia’s entry on Building Information Modeling, the statement is made that building information models are files that are “…often but not always in proprietary formats and containing proprietary data…” This is troubling to some, however, understandable, of course. If your BIM software solution becomes inaccessible for any reason, your work is captive. For many, this is unacceptable and prevents them from moving forward to the power of BIM.
The idea of proprietary formats and databases is rooted in the concept of traditional BIM.
This concept goes back to the beginning days of computer science. The concept is that these custom data structures can be optimized to store information formatted in a way that improves access speed, reducing the time needed to load the BIM’s data. While this can be true, it’s not a given – especially when you consider the incredible capabilities of today’s computers. And it is possible that proprietary file formats actually hinder productivity by limiting the way that proprietary BIM solutions work across systems and disciplines.
This lack of good software interoperability is a major obstacle to efficiency and technology adoption. This is more insidious than it might appear at first. As firms resist the move to BIM, they limit their ability to work with other disciplines in the larger AEC workflow. This can limit access to expertise, raise total project costs, and add workflow gaps that can lead to costly rework.
Is there a solution to this problem? Yes, and it’s not what some may believe to be the obvious answer. The first part of a modern, interoperable BIM workflow is based on industry standard, non-proprietary file formats. Then, you’ll want your BIM model data represented in accordance with open, international standards. And you’ll need the ability to transfer BIM data accurately between multiple BIM tools that support all disciplines in this modern BIM workflow.
Building Information Modeling (BIM) is a term that has become ubiquitous in the design and construction fields over the past 20 years, but where did it come from? The story is rich and complex with players from the United States, Western Europe and the Soviet Block competing to create the perfect architectural software solution to disrupt 2-Dimensional CAD workflows.
The benefits of an architectural design model tied to a relational database have proven to be incredibly valuable, with contractors becoming the primary drivers of BIM technology for the first time in 2012.
What exactly is BIM?
The question often arises, for the purposes of this article, BIM software must be capable of representing both the physical and intrinsic properties of a building as an object-oriented model tied to a database . In addition most BIM software now features rendering engines, an optimized feature specific taxonomy and a programming environment to create model components. The user can view and interact with the model in three-dimensional views as well as orthographic two-dimensional plan, sections and elevation views of the model. As the model is developed, all other drawings within the project will be correspondingly adjusted. A Building Information Model could be designed in a software that is not strictly speaking, ‘parametric’ and where all information and geometry is explicitly defined but this would be cumbersome.
A parametric building modeler will allow the user to create constraints such as the height of a horizontal level, which can be tied to the height of specified set of walls and adjusted parametrically, creating a dynamic database model which is tied to geometry. This development answered a need in the architectural industry to be able to change drawings at multiple scales and across fragmented drawing sheets. The amount of hours that are necessary for the production of drawings has decreased steadily over time with the general trend of non-farm labor in the United States since 1964. The improvement in productivity has risen in concert with computer technology which has automated tedious tasks in all disciplines. Although some of the earliest programs for architectural representation used a BIM metaphor, limitations in computer power and awkward user interfaces for BIM platforms contributed to a growth in two-dimensional line drawing programs such as AutoCAD and Bentley Microstation.
The Beginnings
The conceptual underpinnings of the BIM system go back to the earliest days of computing. As early as 1962, Douglas C. Englebart gives us an uncanny vision of the future architect in his paper Augmenting Human Intellect.
“the architect next begins to enter a series of specifications and data–a six-inch slab floor, twelve-inch concrete walls eight feet high within the excavation, and so on. When he has finished, the revised scene appears on the screen. A structure is taking shape. He examines it, adjusts it… These lists grow into an evermore-detailed, interlinked structure, which represents the maturing thought behind the actual design.”
Englebart suggests object based design, parametric manipulation and a relational database; dreams that would become reality several years later. There is a long list of design researchers whose influence is considerable including Herbert Simon, Nicholas Negroponte and Ian McHarg who was developing a parallel track with Geographic Information Systems (GIS). The work of Christopher Alexander would certainly have had an impact as it influenced an early school of object oriented programming computer scientists with Notes on the Synthesis of Form. As thoughtful and robust as these systems were, the conceptual frameworks could not be realized without a graphical interface through which to interact with such a Building Model.
Visualizing the Model
From the roots of the SAGE graphical interface and Ivan Sutherland’s Sketchpad program in 1963, solid modeling programs began to appear building on developments in the computational representation of geometry. The two main methods of displaying and recording shape information that began to appear in the 1970s and 1980s were constructive solid geometry (CSG) and boundary representation(brep). The CSG system uses a series of primitive shapes that can be either solids or voids, so that the shapes can combine and intersect, subtract or combine to create the appearance of more complex shapes. This development is especially important in representing architecture as penetrations and subtractions are common procedures in design, (windows, doors).
The process of design requires a visceral connection to the medium that the designer is working in. This posed another challenge as architects required a way to tell the computer what to do that was less tedious than the punch cards that were used on early computers. The development of light pens, head-mounted displays and various contraptions in the early days of human-computer interaction (HCI) are well documented elsewhere. A rigorous history of HCI from an architectural perspective can be found in Nicholas DeMonchaux’s book, Spacesuit: Fashioning Apollo. The text carves a narrative of the precursors to BIM and CAD technology as they were entwined in the Space Race and Cold War.
Database Building Design
Seeing buildings through the lens of the database contributed to the breakdown of architecture into its constituent components, necessitating a literal taxonomy of a buildings constituent parts. One of the first projects to successfully create a building database was the Building Description System (BDS) which was the first software to describe individual library elements which can be retrieved and added to a model. This program uses a graphical user interface, orthographic and perspective views and a sortable database that allows the user to retrieve information categorically by attributes including material type and supplier. The project was designed by Charles Eastman who was trained as an architect at Berkeley and went on to work in computer science at Carnegie Melon Uniersity. Eastman continues as expert in BIM technology and Professor at the Georgia Tech School of Architecture.
Eastman claims that drawings for construction are inefficient and cause redundancies of one object that is represented at several scales. He also criticizes hardcopy drawings for their tendency to decay over time and fail to represent the building as renovations occur and drawings are not updated. In a moment of prophecy, the notion of automated model review emerges to “check for design regularity” in a 1974 paper.
Eastman concluded that BDS would reduce the cost of design, through ‘drafting and analysis efficiencies’ by more than fifty percent. Eastman’s project was funded by DARPA, the Advanced Research Projects Agency and was written before the age of personal computers, on a PDP-10 computer. Very few architects were ever able to work on the BDS system and its unclear whether any projects were realized using the software. BDS was an experiment that would identify some of the most fundamental problems to be tackled in architectural design over the next fifty years. Eastman’s next project, GLIDE (Graphical Language for Interactive Design) created in 1977 at CMU, exhibited most of the characteristics of a modern BIM platform.
In the early 1980′s there were several systems developed in England that gained traction and were applied to constructed projects. These include GDS, EdCAAD, Cedar, RUCAPS, Sonata and Reflex. The RUCAPS software System developed by GMW Computers in 1986 was the first program to use the concept of temporal phasing of construction processes and was used to assist in the phased construction of Heathrow Airport’s Terminal three (Laiserin – History of BIM). The founding of the Center for Integrated Facility Engineering (CIFE) at Stanford in 1988 by Paul Teicholz marks another landmark in the development of BIM as this created a wellspring of PhD students and industry collaborations to further the development of ‘four-dimensional’ building models with time attributes for construction. This marks an important point where two trends in the development of BIM technology would split and develop over the next two decades. On one side, the development of specialized tools for multiple disciplines to serve the construction industry and improve efficiency in construction. On the other side is the treatment of the BIM model as a prototype that could be tested and simulated against performance criteria.
A later but prominent example of a simulation tool that gave feedback and ‘suggested’ solutions based on a model is the Building Design Advisor, developed at Lawrence Berkeley National Lab beginning in 1993. This software utilizes an object model of a building and its context to perform simulations. This program was one of the first to integrate graphical analysis and simulations to provide information about how the project might perform given alternative conditions regarding the projects orientation, geometry, material properties and building systems. The program also includes basic optimization assistants to make decisions based on a range of criteria which are stored in sets called ‘Solutions’.
Save this picture!
“The input on the left generates the stairs on the right that can be adjusted parametrically. Charles Eastman’s GLIDE was one of the first programs to incorporate most of the major features present in BIM software today.” Image via Charles Eastman’s paper “GLIDE.”
Virtual Building
While the developments were happening rapidly in the United States, the Soviet Block had two programming geniuses who would end up defining the BIM market as it is known today. Leonid Raiz and Gábor Bojár would go on to be the respective co-founder and founder of Revit and ArchiCAD. ArchiCAD developed in 1982 in Budapest, Hungary by Gábor Bojár, a physicist who rebelled against the communist government and began a private company. Gábor wrote the initial lines of code by pawning his wife’s jewelry and smuggling Apple Computers through the Iron Curtain (Story). Using similar technology as the Building Description System, the software Radar CH was released in 1984 for the Apple Lisa Operating System. This later became ArchiCAD, which makes ArchiCAD the first BIMsoftware that was made available on a personal computer.
The software was slow to start as Bojár had to struggle with a unfriendly business climate and the limitations of personal computer software, so ArchiCAD was not used on large scale projects until much later. ArchiCAD has made substantial gains in user base from 2007-2011, mainly as a tool for developing residential and small commercial projects in Europe. Recent improvements have made ArchiCAD a major player in the market though fundamental issues such as a lack of a phasing component and a complicated (but flexible) programming environment for its family components using GDL (Geometric Description Language) To date, Graphisoft claims that more than 1,000,000 projects worldwide have been designed using ArchiCAD.
Not long after Graphisoft began to sell the first seats of Radar CH, Parametric Technology Corporation (PTC) was founded in 1985 and released the first version of Pro/ENGINEER in 1988. This is a mechanical CAD program that is utilizes a constraint based parametric modeling engine. Equipped with the knowledge of working on Pro/ENGINEER, Irwin Jungreis and Leonid Raiz split from PTC and started their own software company called Charles River Software in Cambridge, MA.
The two wanted to create an architectural version of the software that could handle more complex projects than ArchiCAD. They hired David Conant as their first employee, who is a trained architect and designed the initial interface which lasted for nine releases. By 2000 the company had developed a program called ‘Revit’, a made up word that is meant to imply revision and speed, which was written in C++ and utilized a parametric change engine, made possible through object oriented programming. In 2002, Autodesk purchased the company and began to heavily promote the software in competition with its own object-based software ‘Architectural Desktop’.
Revit revolutionized the world of Building Information Modeling by creating a platform that utilized a visual programming environment for creating parametric families and allowing for a time attribute to be added to a component to allow a ‘fourth-dimension’ of time to be associated with the building model. This enables contractors to generate construction schedules based on the BIM models and simulate the construction process. One of the earliest projects to use Revit for design and construction scheduling was the Freedom Tower project in Manhattan. This project was completed in a series of separated but linked BIM models which were tied to schedules to provide real-time cost estimation and material quantities. Though the construction schedule of the Freedom Tower has been racked with political issues, improvements in coordination and efficiency on the construction site catalyzed the development of integrated software that could be used to view and interact with architects, engineers and contractors models in overlay simultaneously.
“This screenshot from Radar CH (later ArchiCAD) shows how far BIM modeling capabilities had developed by 1984, the first major BIM release on a personal computer.” Image via Graphisoft
Towards a Collaborative Architecture
There has been a trend towards the compositing of architectural files with those of engineers who create the systems to support them which has become more prevalent within the past seven years as Autodesk has released versions of Revit specifically for Structural and Mechanical engineers. This increased collaboration has had impacts on the larger industry including a movement away from design-bid-build contracts towards integrated project delivery where many disciplines typically work on a mutually accessible set of BIM models that are updated in varying degrees of frequency. A central file takes an object and applies an attribute of ownership so that a user who is working on a given project can view all objects but can only change those that they have checked out of a ‘workset’. This feature released in Revit 6 in 2004, enables large teams of architects and engineers to work on one integrated model, a form of collaborative software. There are now several firms working towards visualization of BIM models in the field using augmented reality.
A broad variety of programs used by architects and engineers makes collaboration difficult. Varying file formats lose fidelity as they move across platforms, especially BIM models as the information is hierarchical and specific. To combat this inefficiency the International Foundation Class (IFC) file format was developed in 1995 and has continued to adapt to allow the exchange of data from one BIM program to another. This effort has been augmented by the development of viewing software such as Navisworks which is solely designed to coordinate across varying file formats. Navisworks allows for data collection, construction simulation and clash detection and is used by most major contractors in the US today.
Following in the footsteps of the Building Design Advisor, simulation programs such as Ecotect, Energy Plus, IES and Green Building Studio allow the BIM model to be imported directly and results to be gathered from simulations. In some cases there are simulations that are built directly into the base software, this method of visualization for design iteration has been introduced to Autodesk’s Vasari, a stand alone beta program similar to the Revit Conceptual Modeling Environment where solar studies and insolation levels can be calculated using weather data similar to the Ecotect package. Autodesk, through their growth and acquisition of a broad variety of software related to BIM have contributed to the expansion of what is possible from analysis of a model. In late November 2012, the development of formit, an application that allows the conceptual beginnings of a BIM model to be started on a mobile device is a leap for the company.
Contemporary Practice and Design Academics
Some have taken a negative stance on BIM and parametrics as they assume so much about the design process and limit any work produced to the user’s knowledge of the program. This can enable a novice designer who has learned how to perform basic commands to become an incredibly prolific producer while a highly educated and experienced architect can be crippled from inexperience with a programs interface or underlying concepts. This creates a potential for a generational break line that becomes more harsh as a new technology gains market parity.
Some BIM platforms that have a small market share but have made big impacts on the world of design include Generative Components (GC), developed by Bentley Systems in 2003. The GC system is focused on parametric flexibility and sculpting geometry and supports NURBS surfaces. The interface hinges on a node-based scripting environment that is similar to Grasshopper to generate forms. Digital Project is a similar program was developed by Gehry Technologies around 2006 based on CATIA, a design program (and one of the first CAD programs) that was developed as an in house project by Dessault systems, a French airplane manufacturer. These two platforms have spawned something of a revolution in design as the power to iterate and transform has resulted in especially complex and provocative architectural forms.
Patrick Schumacher has coined the movement of parametric building models in architecture, specifically those which allow for NURBS surfaces and scripting environments as ‘parametricism’ in his 2008 ‘Parametricist Manifesto’.
“The current stage of advancement within parametricism relates as much to the continuous advancement of the attendant computational design technologies as it is due to the designer’s realization of the unique formal and organizational opportunities that are afforded. Parametricism can only exist via sophisticated parametric techniques. Finally, computationally advanced design techniques like scripting (in Mel-script or Rhino-script) and parametric modeling (with tools like GC or DP) are becoming a pervasive reality. Today it is impossible to compete within the contemporary avant-garde scene without mastering these techniques.”
Since these techniques have become increasingly complex there has become a component of architectural schools which is specified to train in specific software. A student with knowledge of only one type of software platform may well be trained to design according to the biases of the programs that they are using to represent their ideas. Software performs useful tasks by breaking down a procedure into a set of actions that have been explicitly designed by a programmer. The programmer takes an idea of what is commonsense (Sack 14) and simulates a workflow using tools available to them to create an idealized goal. In the case of BIM tools, the building is represented as components including walls, roofs, floors, windows, columns, etc. These components have pre-defined rules or constraints which help them perform their respective tasks.
BIM platforms typically represent walls as objects with layers, these layers are defined in terms of the depth and height of a wall and are extruded along the length of a line. The program then has the ability to calculate the volume of material contained within the wall assembly and to create wall sections and details easily. This type of workflow is based on the existing building stock and common industry standards and therefore a project which is produced in a BIM platform which emphasizes these tools is likely to reinforce existing paradigms rather than develop new ones. Additionally, the programmers who worked on the early BIM platforms often did not have a background in architecture but employed hybrid architect/programmers who contributed to the development of the programs. One notable exception I have found to this is the work of Charles Eastman who received a Masters of Architecture from Berkeley before working on the Building Description System. The roots of the major BIM platforms that are in use today have been developed by programmers with the peripheral input of hybrid programmer/architects and a global user base who contributes to the development of the software via ‘wish lists’ or online forums where grievances can be aired about a product workflow. The grievances typically result in new features and build upon the existing interface.
Though the general concept and technology behind BIM is approaching its thirtieth anniversary, the industry has only begun to realize the potential benefits of Building Information Models. As we reach a point where a majority of buildings are being crafted digitally, an existing building marketplace where building materials and structural components can be bought and sold locally will emerge. Sustainable design practices reinforce an attitude of designing for disassembly and a marketplace of these parts is essential. Trends in Human Computer Interaction, Augmented Reality, Cloud Computing, Generative Design and Virtual Design and Construction continue to rapidly influence the development of BIM. Looking back at the past it is easier to realize that the present moment is an exciting time for designers and programmers in this evolving industry.
