Definition
BIM tools like Revit and ArchiCAD treat buildings as databases of intelligent objects. They enable clash detection, automated documentation, and downstream facility management.
Why it matters
BIM is mandated on most public projects in the UK, Singapore, and increasingly India. It eliminates the gap between drawings and reality.
Origin & history
BIM concepts trace back to Charles Eastman's 1975 'Building Description System' paper. Autodesk Revit (2000) and Graphisoft ArchiCAD (1987) commercialised the workflow; the UK's BIM Level 2 mandate (2016) and India's CPWD adoption pushed it from optional to required on public works.
Key points
- •LOD (Level of Development) defines model maturity from 100 (concept) to 500 (as-built).
- •IFC is the open exchange format between BIM tools.
- •Clash detection catches MEP/structural conflicts before site.
Examples
- ›A Revit model that auto-generates plans, sections, schedules, and a quantity takeoff from one source of truth.
Use cases for architects
1Coordinating MEP, structure, and architecture in a single federated model with weekly clash reviews.
2Producing a full set of plans, sections, elevations, and schedules from one source of truth.
3Generating a 4D construction sequence linked to the project programme.
4Handing the as-built model to facility management for lifecycle operations.