Building Information Modeling (BIM) is a comprehensive and collaborative process that manages a construction project’s entire lifecycle – from design and planning to construction, operation, and maintenance.
The innovation of BIM lies in creating a digital model that includes all information related to the project. This model is not merely a 3D drawing but a dynamic and “living” information tool, allowing simulations, clash detection, cost management, and scheduling. It acts as a real-time data platform, accessible to all stakeholders. This enhances transparency, coordination, and accuracy at every project phase, while minimizing errors and delays, and ensuring optimal performance throughout the building’s lifecycle.
Maturity levels
The implementation of BIM evolves progressively through four internationally standardized levels, reflecting the degree of collaboration and technological maturity within a project.
Level 0 – Traditional approach with no collaboration
At this initial stage, BIM is not truly applied. Work is carried out using traditional methods – 2D drawings are used solely for deliverables. There is no common data platform, and each stakeholder manages and modifies their data independently. This approach still represents the current practice in a significant portion of the Greek construction industry.
Level 1 – Limited collaboration with 2D & 3D integration
In this stage, partial coordination begins to emerge. 3D modeling is used at the early design and coordination stages, but final deliverables remain in 2D format for approvals or submission. Information is exchanged through a Common Data Environment (CDE), managed by the contractor or builder. Every involved entity
can access the data, but can only modify its own.
Level 2 – Coordinated collaboration in a shared environment
Effective collaboration is achieved at this level. Teams work in 3D models with synchronized data sharing. While each stakeholder still manages their model, all models are integrated into a shared digital environment, regularly updated, and easily accessible.
Level 3 – Full collaboration (Open BIM)
This is the complete realization of the BIM philosophy. All stakeholders work simultaneously on a unified model in real-time. Access, editing, and updates are immediate and shared. Known as “Open BIM,” this approach ensures full coordination, error elimination, speed in execution, and complete transparency across all project stages.
Advantages of BIM
The adoption of BIM offers significant benefits at every stage of a construction project. It is a holistic project management approach that makes construction more efficient, sustainable, and safe.
1. Design accuracy and error reduction
BIM allows the identification of clashes between different systems (e.g., structural and MEP) before construction, reducing delays, revisions, and extra costs.
2. Improved collaboration and coordination
All stakeholders work on a common model, ensuring genuine collaboration and smooth information flow among architects, engineers, contractors, and owners.
3. Precise scheduling and cost estimation
With 4D (time) and 5D (cost) integration, BIM enables more accurate timelines and realistic budgets, supporting informed decision-making.
4. Comprehensive construction monitoring
The project can be monitored in real time, allowing simulations, analyses, and immediate impact assessment of any changes.
5. Easier maintenance and operation post-delivery
BIM data remains accessible after project completion, making facility management more efficient and cost-effective.
6. Sustainability and energy efficiency
BIM enables integration with energy simulation tools and sustainable design practices, facilitating the construction of green buildings and certifications.
Conclusion
In a constantly evolving construction industry, BIM is no longer a luxury but a necessity. The ability to collaborate in real time, design with precision, and access up-to-date information makes BIM an invaluable tool for the success of any project.
Developed by Cactus
