BIM

Building Information Modelling (BIM)

ISO 19650 information management with BIM. India has no published IS BIM standard — projects reference ISO directly.

Also calledbimbuilding information modellingbuilding information modelingbim hubdigital construction
Related on InfraLens
CODES
ISO 19650-1ISO 19650-2ISO 16739-1ISO 12006-2
TOOLS
/bim/handbook
READ
BIM in India 2026 — Standards, Mandates, and Adoption RealityISO 19650 Explained for Indian Civil Engineers
TABLE
bim conceptsiso 19650 processifc for civil engineersbim india snapshot
Definition

Building Information Modeling (BIM) is a process for creating and managing digital representations of buildings throughout their lifecycle — from conception through design, construction, operation, and demolition. Modern Indian construction increasingly uses BIM for design coordination, clash detection, quantity estimation, construction sequencing, and facility management. International standards: ISO 19650-1:2018 + ISO 19650-2:2018 (information management); Indian Standards: NBC 2016 Part 11 (Building Automation), with NBIMS-IN (National BIM Standard - India in development).

BIM levels (per UK BIM Maturity Model): Level 0 — paper-based 2D CAD; Level 1 — 2D + 3D models without integration; Level 2 — 3D models with shared data (current Indian practice for major projects); Level 3 — fully integrated lifecycle model (advanced markets). LOD (Level of Development) progression: LOD 100 (concept), LOD 200 (schematic), LOD 300 (detailed design), LOD 350 (construction documentation), LOD 400 (fabrication), LOD 500 (as-built/FM). Each LOD represents increasing model specificity and accuracy.

BIM tools: (1) Authoring — Autodesk Revit (dominant Indian use), Bentley Microstation, Graphisoft ArchiCAD, Trimble Tekla. (2) Coordination — Autodesk Navisworks Manage, Solibri Model Checker, Trimble Connect, BIMcollab. (3) Quantity take-off — Vico, Tekla, Revit Quantification. (4) 4D scheduling — Synchro, Navisworks. (5) 5D cost — Vico, ProEst, Buildxact. (6) Facility management — IBM TRIRIGA, Archibus. Indian BIM market: dominated by Revit (75%+ share), Tekla in steel-heavy projects, Bentley in infrastructure. Major Indian BIM users: L&T, Tata Projects, Capacit'e, Brigade Group, M3M, DLF. Government BIM initiatives: UP RERA mandates BIM for projects above 10,000 sqm; Mumbai metro requires BIM Level 2; airports increasingly require BIM Level 3.

Typical values
BIM Level (typical Indian)Level 2 (3D + shared data)
LOD for design stageLOD 200-300
LOD for tenderingLOD 300-350
LOD for constructionLOD 350-400
Cost benefit (clash detection)3-10× ROI
Indian BIM market share (Revit)75%+
Where used
  • Design coordination — primary current value of BIM
  • Clash detection — eliminating field rework
  • Quantity estimation — automated take-off from model
  • 4D scheduling — sequencing and planning
  • Facility management (post-construction) — running and maintenance
Acceptance / threshold
Per ISO 19650 + project BEP (BIM Execution Plan): authoring tool, exchange formats (IFC), LOD progression, clash detection workflow, federated model creation, deliverables.
Site example
Site reality: a Bengaluru airport-terminal project at LOD 300 BIM had 8,400 clashes identified — 1,200 critical (HVAC ducts in structural elements). Resolution: ₹4.8 cr in design effort. Estimated field rework if uncaught: ₹28 cr in concrete demolition + MEP re-routing + schedule slip. BIM ROI for this project: 5.8×. Common Indian range: 3-10× for major construction. BIM is now the standard for any project >₹50 cr.
Frequently asked
What is BIM in construction?
Building Information Modeling (BIM) is a process for creating and managing digital representations of buildings through their lifecycle. Includes 3D models, design coordination, clash detection, quantity estimation, construction sequencing, and facility management. Indian standards: NBC 2016 Part 11; international: ISO 19650:2018. Indian BIM market dominated by Autodesk Revit.
What are the levels of BIM?
BIM Maturity Model: Level 0 — paper/2D CAD. Level 1 — 2D + 3D without integration. Level 2 — 3D + shared data (current Indian practice). Level 3 — fully integrated lifecycle model. Modern Indian commercial and infrastructure projects typically operate at Level 2; airports and metro increasingly require Level 3. LOD (Level of Development) tracks model specificity: 100 (concept), 200 (schematic), 300 (detailed), 350 (construction docs), 400 (fabrication), 500 (as-built).
What software is used for BIM in India?
Authoring: Autodesk Revit (75%+ Indian share), Bentley Microstation (infrastructure), Graphisoft ArchiCAD (architecture), Trimble Tekla (steel structures). Coordination: Autodesk Navisworks Manage (dominant), Solibri Model Checker, BIMcollab. Quantity take-off: Vico, Tekla, Revit Quantification. 4D scheduling: Synchro, Navisworks. 5D cost: Vico, ProEst, Buildxact.
Related bim terms
ISO 19650 Series
5-part international standard for BIM information management. Parts 1-5: concepts, delivery, operations, exchange, security.
Industry Foundation Classes (IFC)
Open ISO standard file format for BIM exchange. IFC 4.3 ADD2 supports buildings + infrastructure.
Level of Development (LOD) / LOIN
AIA LOD 100-500 vs BIMForum LOD Spec vs ISO 7817-1 LOIN. Defines geometric/info detail per object per milestone.
Common Data Environment (CDE)
Single trusted location for all project information. Mandatory under ISO 19650 with WIP→Shared→Published→Archived states.
BEP & EIR — BIM Execution Plan / Exchange Information Requirements
EIR = client requirements (in tender). BEP = how the contractor will deliver them. MIDP/TIDP = the schedule.
Uniclass / OmniClass / Classification
Uniclass 2015 (UK) is the most-used BIM classification on Indian projects. India has no published classification.
BIM Roles — Manager, Coordinator, Modeller
BIM Manager (firm), Project BIM Manager (one project), Information Manager (enforces ISO 19650), BIM Coordinator (clash), Modeller (authoring).
LOD 200 (Schematic Design)
Generic systems, approximate quantities, size, shape, location, orientation. Suitable for schematic stage.