Element-based cost calculation from abstractBIM quantities

Extract quantities early in design and iterate cost alongside the model.

Starting point

• Architecture models are optimized for drawings and presentation, not quantity takeoff.
• Preparing them for cost evaluation is labor-intensive and often happens too late - after major decisions are fixed.

Goal & benefit

• Extract quantities in early design phases.
• Iterative design to cost: compare options before costs are locked in.

Process

1. Provide an architecture model meeting the minimum requirements.
2. Upload to abstractBIM.com to build a consistent quantity model.
3. Download the model and use it for automated quantity takeoff.

Outcome

• Building volume and gross floor area.
• Interior and exterior walls with a clear relation to one or two spaces.
• Slabs, roofs, and base slabs.
• Windows, doors, and coverings with space relation and direction.

Deliverables

• Architecture model with IfcProject, IfcSite, IfcBuilding, IfcBuildingStorey, IfcSpace, IfcWindow, and IfcDoor
• Room name in LongName, optional room number in Name
• abstractBIM quantities as the basis for cost estimates and option comparison