Is the Revit BIM takeover of AutoCAD imminent in the Future of MEP?
BIM is a computer-aided design system that helps to create 3D models of buildings and other
physical objects. The system can be used to help with designing, constructing, and testing the
structures and systems within a building. Introduction of new technologies into MEP BIM
modeling solutions have always been viewed in two ways - one is a usual technical response to
quickly adapt to a likely better technology that substantially improves on the present solution
and secondly the question of comfort and reliability where the users ponder on whether the new
technology can guarantee the comfort and years of development that the earlier technology is
backed up with. The use of AutoCad and the newer addition of Revit for MEP has brought the
same question to the construction and design industry.
Both AutoCAD and Revit are powerful design tools that have been around for a considerable
time, enough to have been tested and differentiated. They both help designers create and
manage projects, but they have some key differences which could be substantial in answering
the question on the best software among the two or are they better as compliments to each
other.
AutoCAD - An Overview
CAD stands for "Computer Aided Design." AutoCAD is a line of two-dimensional and
three-dimensional design software produced by the Autodesk company. It includes a powerful
suite of features to improve workflow and create true-to-life maps, diagrams, structures and
schematics. CAD software is equal part design and analysis.
The design is needed to produce models and prepare component production, and the analysis
helps calculate stress levels, the influence of forces and the influences of finite elements in a
design. AutoCAD is a digital drafting tool that means projects are represented by geometric
figures. This program is especially effective for 2D drafting and precise linework, but it is not a
building modeling tool. AutoCAD can also create 3D models and renders, but they are still
geometric models with no component information.
Is AutoCAD a BIM software?
In essence NO. BIM modeling is a multi-storeyed concept with a variety of supporting services.
AutoCAD is a facilitator of BIM and forms an integral part of the BIM modeling system. BIM is a
comprehensive representation of a building, including its many systems and elements that
contribute to it. BIM quantifies building design plans, maintenance and upkeep, utilization, and
more. This gives context to facilities from any perspective, including mechanical, electrical,
plumbing, infrastructure, architecture, and more.
With CAD tools, facility managers can use them to manipulate and change drawings, but these
insights lack deeper context. With BIM software, CAD drawings become the foundation for
creating digital twins that have all the information needed to understand facility systems.
Revit and AutoCAD - what separates them?
The most noticeable difference is that AutoCAD is CAD software which uses basic geometry to
represent real life objects and Revit is software for BIM that uses geometry equipped with real
life information. Revit for architects is an entire design and documentation solution which has a
wide range of applications in the building project whereas AutoCAD is a general drawing tool
particularly for 2D drawings. 3D BIM modeling uses the Revit tool to coordinate all data inputs
(including CAD) and is great for modeling, generating cost schedules, collaboration and change
management.
But is it the end for AutoCAD?
There is no doubt that Revit for the MEP and AEC market offers far more utilities than AutoCAD.
But, AutoCAD was the ever CAD application to be introduced and utilized by many architects
and engineers transforming the drawing sheets to digital drafts and as mentioned earlier,
AutoCAD and Revit are interoperable, the same projects use both the programmes with
specialists working on different needs of the project on both these software. Revit for architects
employs AutoCAD on design components within the same project using Revit for BIM modeling.
If Revit is to overtake AutoCAD completely in the future is insignificant considering that the
relationship they hold is rather symbiotic and the fact remains that an essentially understanding
of CAD software provides necessary information and context to work with BIM tools like Revit.