¿What is BIM?
BIM (Building Information Modeling) is a technology based on the creation of a central model that contains information associated with the parts that make it up.
In the traditional methodology, a project’s development is based on 2D plans. In large projects and in advanced phases of a project, numerous teams work in parallel and the information chain is often lost. In the end, imbalances are found during construction that often affects delivery dates.
In the BIM methodology, the project’s development is based on a unique virtual model. The different teams construct the building virtually, so coordination problems are solved before the construction phase.
¿Why is BIM better?
Improved design process. The capacity to build the model improves the understanding of the space projected. Clashes can be solved in the 3D model that was not visible before and that previously had to be improvised during construction.
Improved document management. The documentation is obtained from the model rather than a 2D interpretation being produced, as with the traditional methodology. Information reliability is substantially higher than with previous technologies.
Improved construction process. BIM pre-builds before the build, allowing what has been planned and foreseen to be executed during construction, thereby minimizing unforeseen events and changes in the construction phase.
Improved maintenance. By digitizing assets with BIM, a current state is obtained that serves as a base for future interventions.
CHANGES TO THE PROJECT
In a project in the execution phase with the measurements already made and the floor plans, sections and elevations already drafted, the client decides to change the size and position of all the windows.
In BIM: In just a few hours, the type and position of the windows are changed, and the measurements are regenerated.
In CAD: A number of weeks are needed to redraw the plans and regenerate the measurements.
In a large-scale project, the different MEP building services (air, PCI, plumbing, etc.) are installed by different companies, often simultaneously. The architecture project advances in turn.
In CAD: Updated plans must be supplied to all companies every few days. The work done by the different companies is not coordinated and it is very difficult to detect clashes between each company’s work. This will probably be solved during construction and will cause delays.
In BIM: The companies can have a daily (even real time) updated model of the building and the other parts while they are produced. The BIM Manager can detect clashes between all the companies’ BIM work at any time. The analysis takes just a few hours. Construction problems of this type are avoided.
The client requests photorealistic views of the complex or its parts.
In CAD: A 3D model of the project must be produced for this purpose and photorealistic views (renders) taken of it. This may take several days for small projects, or weeks in larger ones.
In BIM: Views of the project model can be taken at any time and in just a few hours.