Advantages And Disadvantages When Using BIM

BIM is a technology that has the potential to revolutionize the design and construction process. According to the President of the American Association of Mechanical Contractors, BIM is becoming a "growth factor" for contractors doing business in the US. BIM is able to create a 3D geometric model of a building that can then be navigated as a video game and updated continuously. The BIM models provide electronic construction drawings or prints which express a considerable amount of detail. There are advantages and disadvantages of using BIM and it is important for contractors to see how efficient this technology can be for their work.

Advantages of applying BIM


Increase the ability to coordinate information (increase collaboration among stakeholders) As the digital model from BIM describes the work in a uniform way, it can significantly improve the coordination of information in the design stage, construction and life cycle of the project. BIM provides a clear overview of the work that helps the project stakeholders make the right decisions, minimize risks and improve work efficiency.

BIM allows unprecedented collaboration in design activities. BIM gives all contractors the opportunity to sit together and work on issues before the start of construction. BIM is used to build three-dimensional models of space design. Architecture consultants develop their own architectural models. Structural modeling consultant. Electrical, water, engineering engineering for electrical, water, and air conditioning engineering.

Later, these separate models were integrated into a unified, integrated model. As a digital model, architects, engineers, electricians, contractors, and developers at each stage of the project life cycle can add information to it, communicate From it or edit the information in it to support their work.

All members of the construction project will work together in a common space to find conflicts between parts and structures of the building and at the same time find solutions to the conflict. The most appropriate and useful way to create a highly accurate construction drawing system, leading to a reduction in the costs incurred on site. Thus, with BIM, members of the construction project no longer work separately in their own environment, but work on a unified information block of the building. Changes in the composite BIM model will be automatically updated on the component models, on the drawings, statistics tables, standards, etc., to help maintain the integrity of the flow of information.

By using BIM, project members can clearly understand what other members are doing with the work and therefore have more influence on the work of the members. other. This is especially useful in cases where "collisions" can lead to "stacking of trades" - areas where two different contractors plan to install equipment or materials in same space, sometimes same time. In fact, to solve this situation, a contractor has to remove the material and re-install it or wait for the construction site. However, if this issue is brought into the BIM model, this problem can be predicted and the solution can be processed before the work is done.

Moreover, the members of the project can use BIM to explore the different construction options, the construction sequence, or the feasibility of building components as well as the entire building. . At the same time, as BIM creates a three-dimensional model with full information on the components of the work from shape, size, to material structure, finishing, the members of the project Can easily calculate volume, help to build estimates and schedule of works. BIM can also be used to explore the placement of crane equipment, materials, as well as temporary works on the site ... to build a construction plan to help increase value and reduce waste.

Icon The design is easier to visualize

In the conceptual design phase, BIM is used to convey the design idea to the owner. The three-dimensional visual effects available in BIM help to convey the idea of ​​architecture is made much more effective. BIM also presents a complete and complete presentation of the construction works including shape, size, material structure, finishing, and much more. Through BIM, the project owner can easily visualize the shape of the building, the critical space, and the harmony of the building with the surrounding landscape. Investors can easily see what their actual works will look like in the future. BIM helps the investor not only understand the design idea better, but also easily provide feedback to the architectural consultant so that the architectural consultant can modify the design to meet the requirements of investor. Moreover, BIM is used to evaluate various design options, making the review and decision-making more accurate.

For contractors, the BIM model is relatively easy to understand and displays the depth and altitude clearly and visually. On a drawing that does not use BIM technology, the contractor may not be able to see at a glance what an entry on the drawing will look like when it is completed. However, on a BIM model, this entrance will appear on the computer screen just like the image it will be performing in practice.

Virtual samples generated in the BIM process also provide great benefits to the mechanics of refrigeration engineering to optimize the layout of HVAC (Heating, Ventilation and Air Conditioning) systems. air) with limited space of works. Or replacing the gas circulator in the technical room, or rearranging the duct, the ability to build a virtual HVAC system and 3D virtualization it can ensure that every device will fit in the installation.

Icon Flexibility

With BIM, it's easy to adjust the design. When there is a change in the BIM model, it automatically updates all component drawings that are affected by the change. For example, if the lobby is added to the first floor on the BIM model, all drawings showing the first floor will also display the details needed to construct the lobby. Once the change is made with the BIM model, there will be no need for manual adjustments on each component drawing. Designers simply need to print a new construction drawing.

Icon Improve cost calculation

BIM can simplify and help calculate costs because of the depth and accuracy of the information it provides. The easy connection to the material and the number of installation parts that can be output from the model can improve the speed and accuracy of the estimation, resulting in design changes. Costs can be addressed proactively

Icon Reduce installation costs

Before the installation process, BIM will help identify inappropriate details, such as parts of the design that occupy the same location. The designer can then adjust it earlier to reduce or eliminate changes during the installation process.

A BIM model can be used to make the details of a building, such as a pipe, reliable. This will help to save costs associated with assembly and installation.

Icon History works

When a building is designed, installed and used, the digital model can be used as an important information for the owner and service contractor. For example, if a part of a building is damaged, the building information model can be used to determine the location, manufacturer, model number, operating parameters, and data appropriate for repairing a building. Efficient way or replacement of that detail.

If a part of the work is remodeled, the construction information model will be used to identify closed details, such as pipes and electrical equipment, to promote decisions on the new design model.

Disadvantages of BIM


Icon Training costs and software costs

The use of BIM requires careful training. The use of modeling software always comes with costs such as licensing, software acquisition costs and training. A bidder who wants to apply BIM may need to upgrade their computer system to use BIM software effectively.

Icon Much more has to be done before construction works

BIM requires more effort at the beginning of the project. When BIM is used, it will not be effective if the contractor merely submits their own work plan and then proceeds to construct. It is a prerequisite that the construction contractor has to work with designers and other contractors to create a model of cooperation between the parties.

Icon Damage to procurement and construction

Although one of the advantages of using the BIM model is that adjustments can be made quickly, BIM can undermine the procurement process and general construction and construction process when ordering items requires long waiting times. For example, a contractor may need to order supplies based on the dimensions listed in the design drawings, which may take weeks or months from the time of purchase to delivery. However, if other contractors enter their job information into the model in the process, causing the size to change, the first contractor may not have enough time to order the supplies.

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