What is Building Information Modeling (BIM) and how has it evolved from the 1970s to the present day?

Building Information Modeling (BIM) is a process for digitally representing the functional and physical characteristics of a building. It also provides a means of sharing information that can be used to make decisions throughout a building's lifecycle, from conception. BIM includes the use of software to generate and manage data and information about a building, usually in a format that meets the needs of both the builder and the developer. Many organizations around the world already use some type of BIM software to plan, design, and build a variety of facilities, from commercial and healthcare to educational and industrial.

A building's design team uses BIM to create a virtual model of the building, which is then reviewed by the owner and delivered to contractors and subcontractors for construction once completed. Even after construction is complete, BIM models can be delivered to building operators, who will perform daily maintenance and operation (O&M). Each of these parties can add data to the BIM model that is specific to their area of ​​expertise, reducing the loss of information that often occurs when a new team takes responsibility for a structure.

Image: https://www.autodesk.com/blogs/construction/guide-to-bim/

BIM is more than 3D modeling. It combines geometry with structured data, turning a design file into a shared knowledge resource for the entire project lifecycle.

Collaboration is where BIM delivers its biggest returns. Working from a single shared model means conflicts are caught during design rather than on site, reducing the errors, delays, and cost overruns that stem from miscommunication.

BIM has applications well beyond building design. From structural and civil engineering to healthcare and smart city planning, BIM's core value translates across industries and scales.

Successful BIM adoption is as much about people as software. Investing in training, establishing clear standards, and treating implementation as an organizational change program are just as important as choosing the right tools.

AI and immersive technology are expanding what BIM can do. Generative design, predictive maintenance, and VR walkthroughs are moving BIM from a coordination tool to a system that actively supports better decision-making.

Why is BIM important?

The importance of BIM lies largely in the fact that construction is one of the least digitized sectors, according to a study by McKinsey. This study also shows that large construction projects take about 20% longer to complete than originally scheduled. BIM can cut both schedules and construction costs by providing the visualization of components, allowing for changes to be made early in the design process.

Early adopters of BIM have been quick to recognize its benefits. Another study by Dodge Data & Analytics, 82% of BIM users say they achieved a positive return on their investments, primarily as a result of shorter completion times and reduced material costs.

Furthermore, the report shows that 69% of the contractors using BIM report an improvement in project safety due to the ability of BIM to identify potential hazards during the design phase.

With the right BIM strategy, there are endless opportunities and benefits, including:

1. Improved Communication and Collaboration

2. Model-Based Cost Estimation

3. Preconstruction Project Visualization

4. Improved Coordination and Clash Detection

5. Reduced Cost and Mitigated Risk.

Evolution from the 1970s to the present day (Brazil and World)

The concept of BIM has been developing since the 1970s, but only became a consensus term in the early 2000s. It evolved from traditional 2D drawing to advanced 3D modeling and the data-rich environment we know today. Here is an overview of the timeline:

1970s to 1980s: Early concepts of object-based modeling emerge in academic research. Archicad, released in 1984, is widely cited as the first commercial BIM-style tool.

• 1972: RUCAPS (Really Universal Computer-Aided Production System) was initially developed in the early 1970s (with precursor work in 1972) by the British company GMW Computers Ltd.

• 1974: Professor Charles Eastman is considered the "father of BIM." He created the Building Description System (BDS), the first computerized system to incorporate the concept of digital building representation.

• 1984: Archicad (Hungarian company Graphisoft)

First version of ArchiCAD®, created by Gábor Bojár based on BDS and released by Graphisoft for Macintosh in 1987. Source: AEODC

• 1985: MiniCAD (Diehl Graphsoft)

• 1995: Autodesk organizes an alliance with 12 companies to demonstrate the benefits of interoperability

• 1996: The IAI Interoperability Alliance for Interoperability was established

• 1997: IFC 1.0 - Industry Foundation Classes is a specification that aims to facilitate the exchange and sharing of Building Information Modeling (BIM) data between applications developed by different software vendors

• 1998: IFC 1.5.1

• 1999: IFC 2.0 / "Building Product Models" EASTMAN, 1999 (01/06/1999)

2000s: The term "Building Information Modeling" enters mainstream AEC vocabulary. Revit popularizes parametric modeling and is acquired by Autodesk in 2002.

• 2000: Revit 1.0 (Revit Technology Corporation) / IFC 2x

• 2002: Autodesk acquires Revit

• 2003: Thesis Prof. Cláudio Jacoski IFC (2003) / General Services Administration (GSA) launches 3D-4D-BIM Program (05/03/2003) / IFC 2x2

• 2008: "BIM Handbook" EASTMAN et al., 2008 / Brazil: USP Polytechnic BIM Research Group (2008) / 11/01/2008 IFC changes its name to BuildingSMART / Brazil: Interinstitutional Group Sinduscon SP + AsBEA + Abrasip + ABECE + USP + Mackenzie - Maria Angélica Covelo (coordinator) 2008

• 2009: Brazil: Published in ABNT - CEE 134 (creation) / 25/06/2009

• 2010: Brazil: Sinduscon SP Technical Mission USA – Carnegie Mellon – 09/2010 / Brazil: ABNT ISO 12006-2 / Brazil: I BIM Seminar Sinduscon SP (10/2010)

2011 onward: The UK mandates BIM Level 2 on public projects, sparking global adoption. The US National Institute of Building Sciences advances NBIMS-US.

• 2011: Brazil: ABNT NBR 15965-1:2011 (14/07/2011) / BIM MANDATE (UK)

• 2012: Brazil: ABNT NBR 15965-2:2012 (10/07/2012)

• 2014: Brazil: ABNT NBR 15965-3:2014 (16/12/2014)

• 2015: Brazil: ABNT NBR 15965-7:2015 (01/12/2015)

• 2016: Brazil: ABNT NBR 15965-4:2016 (12/07/2016)

2018: ISO 19650 is published as a family of international standards for information management using BIM across the life cycle of built assets.

• 2018: Brazil: ESTRATÉGIA BIM BR Decreto 9.377 (17/05/2018)

• 2019: Brazil: ESTRATÉGIA BIM BR Decreto 9.983 (22/08/2019)

2020s: Cloud collaboration, digital twins, and AI start to layer on top of the BIM model.

• 2020: Brazil: ESTRATÉGIA BIM BR Decree 10.306 (02/04/2020) mandates the use of BIM in architectural and engineering works and services in the federal public administration, in a phased manner (Phase 1 in 2021, Phase 2 in 2024, and Phase 3 in 2028).

• 2021: Brazil: The new Bidding Law (Law No. 14.133/2021) expressly prioritizes the use of BIM in public procurement.

• 2024: Brazil: The BIM BR STRATEGY is updated by Decree No. 11.888/2024 / The official integration of Artificial Intelligence (AI) into BIM software occurred in waves, accelerating from the end of 2024, by Autodesk and Bentley Systems.