The As-Built model and its interaction with the 4D, 5D and 7D dimensions of BIM applied to control centers

Imagen 3d As built

As we previously highlighted in our article Optimizing the design and the management of control centers with BIM, the BIM methodology covers all phases of a project in the construction process and the information it can provide us in the different dimensions. However, it is important to highlight that BIM is not limited exclusively to the design and construction phase of a project, it also has a fundamental role in the management, planning and maintenance of the work during its useful life.

In this article we will analyze the importance of the As-Built model and how the application of the BIM methodology in the design of control centers allows us to better plan the different stages of construction (4D), an analysis of the costs corresponding to the different areas (5D) and how it helps our client in managing the life cycle of the work (7D).

What is the As-Built model?

Imagen 3d As built

Once the work is completed, the final result may have differences with the original design due to unforeseen events during the course of the work that require modifications or adjustments to the budget. For this reason, it is necessary to update the documentation and representation of the project as it was actually built, which gives rise to the As-Built model, which reflects all modifications with respect to the original design, providing exact information for future interventions.

If the project has been developed according to the BIM methodology, an As-built BIM model will be created, which will involve updating the digital model with exact information about the actual construction.

The model update is done by collecting the information of the final result and can be done in two ways:

  • Modifying the 3D model manually through the use of traditional measurement tools.
  • Generating a 3D model from a point cloud created using more advanced tools, such as the laser scanner. This tool is very useful in large projects.

In addition to obtaining an exact digital model, the BIM methodology allows us to link technical and descriptive information to each element of the model through the use of parameters offered by software such as Revit.

What information does the As-Built model contain?

Documentation in an As-Built model can include elements such as an updated 3D model, information on materials and components, planimetry, sections, construction details and information on facilities with their exact location. In addition, it allows you to have a record of changes made during the construction process, construction phases (4D) and many other calculations related to the construction and its facilities, such as volumetry and areas, cost estimation (5D), etc.

Modelo As built

How to integrate dimension 4 and 5 of BIM into our As-Built model

4D BIM involves the digital representation of the different phases in which the construction will take place so that you can have exhaustive control of the times.

Structuring the model by stages or construction phases will help us organize the construction process and assign elements to each corresponding phase, using the model parameters. In addition, it is possible to assign installation start and end dates to each element, reflecting the actual moment in which they were placed on the job.

dimensiones 4d 5d As built
planificacion As built

There are tools such as Navisworks, Microsoft Project or Syncro4D, which allow you to link the BIM model with the scheduled construction tasks, so you can carry out temporary planning and create an animation of the construction process, which will facilitate decision making by obtaining a visual representation. of the development of the work. In this way, it is possible to analyze whether the deadlines assigned for each construction phase are being met, identifying possible delays or advances and taking measures as necessary.

Cost it As built

Good planning also involves controlling project costs.

The 5D dimension of BIM allows the elements of the model to be related to a price base through specialized budgeting software, such as Presto. From our model we can extract measurements so that when exported through the Cost-it plug-in to the budgeting software, we will obtain an estimate of the costs of each construction phase of the control center.

Integrating the 4D and 5D dimension into the As-Built model provides us with a more complete and detailed representation of the construction process, which facilitates decision making and efficient project management.

Advantages of having an As-Built model in BIM for the life cycle management of a control center

The advantages of having an As-Built model in BIM are diverse. For example, the continuous updating of the model guarantees a faithful representation of reality, which in turn facilitates the planning and execution of maintenance and repair tasks in the control center. Additionally, providing detailed documentation of all changes made during construction helps make decisions about future actions and reduces the risk of errors, saving time and money in management and maintenance throughout the life cycle of the control center. .

What does the 7D BIM dimension consist of?

Finally, the As-Built model will be the starting point for the creation of a digital twin that will be fundamental in the 7D dimension of BIM.

The 7D dimension focuses on the management of the life cycle of a project, which allows logistical control during its use and the maintenance of its useful life, for which it is necessary to have the project model as it has been built or the model As-Built. With this, it will be possible to develop the Asset Information Model (AIM), that is, the Asset information model, which covers its entire life cycle.

By integrating the As-built model into asset management, the different parties involved will be able to verify that the facilities match the plans. In this stage, important data and documentation for construction maintenance will be integrated into the model, such as maintenance scheduling, information on equipment guarantees, user manuals, maintenance plans, certification documentation or any relevant information for the management of the project. project.

In short, while the As-Built model provides the digital representation of how a facility was actually built, the AIM Model becomes a centralized file that all interested parties have access to for updates and to ensure efficiency in the installation. project management.

At GESAB we are already immersed in the implementation of BIM in the development processes of control center projects, recognizing its value to improve efficiency, precision and management at each stage of our projects.

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