The first step is extracting data from the PDF drawings. This can include architectural plans, elevations, sections, and other relevant information. The data is typically extracted using specialized software tools that can interpret and convert the PDF content into usable data.

Once the data is extracted, it is used as a reference to create a 3D BIM model. The extracted data helps in generating the geometry, dimensions, and spatial relationships of the building components. This process involves utilizing BIM software, such as Autodesk Revit, to create intelligent and parametric objects like walls, doors, windows, and other elements of the building.

After the 3D model is created, annotation and documentation are added to provide additional information. This includes adding dimensions, annotations, and specifications to the model, ensuring that the BIM model contains all the necessary information for construction, analysis, and project management purposes.

The converted BIM model can be integrated with other project data and shared among project stakeholders. This facilitates collaboration and coordination among architects, engineers, contractors, and other team members involved in the project. The BIM model serves as a centralized source of information, enabling better decision-making, clash detection, and project coordination.