The software was initially offered only as a monthly rental, with no option to purchase. The software progressed rapidly, with version 2. At the heart of Revit is a parametric change propagation engine that relied on a new technology, context-driven parametrics, that was more scalable than the variational and history-driven parametrics used in mechanical CAD software. The ease of making changes inspired the name Revit, a contraction of Revise-Instantly. The concept of bi-directional associativity between components, views, and annotations was a distinguishing feature of Revit for many releases. Two key differences in Revit were that users created parametric components in a graphical “family editor” rather than a programming language, and the model captured all relationships between components, views, and annotations so that a change to any element automatically propagated to keep the model consistent. At the time, several other software packages-such as ArchiCAD and Reflex-provided a three-dimensional virtual building model, and let the user control individual components via parameters parametric components. The company was renamed Revit Technology Corporation in January From the outset, Revit was intended to allow architects and other building professionals to design and document a building by creating a parametric three-dimensional model that included both the geometry and non-geometric design and construction information, which is also known as building information modeling or BIM Eastman C. The original software was developed by Charles River Software, founded in, renamed Revit Technology Corporation in, and acquired by Autodesk in The software allows users to design a building and structure and its components in 3D, annotate the model with 2D drafting elements, and access building information from the building model’s database. Autodesk Revit is a building information modelling software for architects, landscape architects, structural engineers, mechanical, electrical, and plumbing MEP engineers, designers and contractors.

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