Building Information Modeling (BIM) is a design process change that is taking the place of the old design build processes of the 20th century. Gone are the days of two dimension blueprints that contain confusing lines, circles, and text to describe the design of a building. This old design process is being taken over by much clearer 3D, and even 4D and 5D, design models that show everything in a design from exact quantities of materials to geometric depth of designs and functions.
The process of BIM is much more than sophisticated modeling, high tech graphics, and architectural analysis. The key concept of BIM is based upon communication and coordination of efforts between all parties involved within the design and build process. Those process owners include the owner, architect, general contractor, subcontractors, engineers, and any other stakeholder involved in the building design and completion.
BIM can be accomplished in three different stages. Each stage builds upon the previous stage. The stages of BIM are:
- Lonely BIM – This stage of BIM is for organizations that are just beginning to use the BIM techniques. This is more of a learning process stage allowing project owners to incorporate BIM concepts on one part of a project.
- Social BIM – This second stage of BIM allows for sharing of model information between members of different project areas. This allows for better communication of key facets and functions of a building design to better improve efficiency in cost as well as work completion.
- Intimate BIM – This third stage of BIM is the sharing of one single source model between all shareholders of a project.
While all of this sounds great, how does a project team and an owner implement BIM?
Step 1 – Identify a BIM Champion – As with any project, someone needs to be dedicated and responsible for the completion and the implementation of BIM. Like with LEAN management, unless there is a tone from the top and all senior leadership buys into the process change, change will be hard to come by. Having a champion for the process will provide the support that the process needs in order to ensure its success.
Step 2 - Schedule and Timeline – A schedule and timeline is critical to timely completion of the project. The schedule and timeline should be coordinated with both the process implementation and project level personnel.
Step 3 – How will BIM be Used for the Project – Remember, if you have never used BIM before, you might want to start small with one or two segments of a project. Return on Investment (ROI) should always be a consideration when determining the extent of BIM’s use on a project. Always consider ways to leverage partnerships between different project shareholders (engineers and designers, designers and subcontractors) in order to maximize the use of BIM on current and future projects.
Step 4 – Software (Hardware) – Determine the extent of software or hardware needs in order to complete the BIM project. Consider software and hardware for design, coordination, detailing and estimating, scheduling, and design rendering.
Step 5 – Consider Software Standards – All software has different terminology and file standards. Ensure that these standards meet the need of the project. The different standards in most software are:
· General Standards – Traditional file nomenclature.
· Revit – Specific standards to identify worksheets, phasing, and standard parameters.
· Discipline – Specific standards to identify material nomenclature and other more specific design build items.
Step 6 – Model Access – Who in the company or design team will need access to what areas of the model? Will access include estimating, project management, accounting, and external parties? Identifying who has access to what parts of the model is important to transparent communication and design build methodologies.
Step 7 – Level of Detail – How much to do to the model? This will determine the depth of the modeling. An example would be wall design and dimensions. Do you design for nominal dimensions, actual dimensions by defining layers and fire ratings, or to detailed dimensions where you may look at a wall by the layers of brick and mortar.
Step 8 – Workflow – Ensure that all parties and stakeholders involved in the project agree to the modeling and overall scheduling and workflow for timely and complete job performance.
In short, BIM is a new way of thinking and modeling for building and design projects. If this is your first time down the BIM path, remember the following tips:
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Make a plan and keep it simple.
- Start with a pilot project.
- Don’t oversell BIM to staff and project personnel. BIM will require significant effort by all parties involved to make the project a success.
- Enable your BIM champion.
For more information on BIM, please contact David B. Blain at dblain@macpas.com.