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represented in Figure 13.1, each view is drawn separately with no inherent rela-
tionship between drawings. In this type of production environment, the team
creates plans, sections, elevations, schedules, and perspectives and must coordi-
nate any changes between files manually.
FIgUre 13.1 A CAD-based workflow
In a BIM-based workflow, the team creates a 3D, parametric model and uses
this model to automatically generate the drawings necessary for documenta-
tion. Plans, sections, elevations, schedules, and perspectives are all by-products
of creating an embellished BIM model, as shown in Figure 13.2. This enhanced
documentation methodology not only allows for a highly coordinated drawing
set but also provides the basic model geometry necessary for analysis, such as
daylighting studies, energy, material takeoffs, and so on.
Using Revit Architecture becomes more than a change in software; it becomes
a change in workflow and methodology. As various design specializations inter-
act and create the building model (Figure 13.3), you can see how structure,
mechanical, energy, daylight, and other factors inform design direction. You can
also draw relationships between some of these elements that might not have
been as obvious in a more traditional approach. Although some of these special-
ties (such as structure and mechanical) are historically separate systems, by
integrating them into a single design model, you can see how they interact in
relation to other systems within a building.
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