Building Information Modeling

“Building Information Modeling”, in short, BIM is a virtual construction of any building, structure, architectural features, Mechanical, Electrical and Plumbing activities, built on a computer, much before physical construction starts. BIM is a three-dimensional view of the structure/building and its components.


When a building or structure is in the stage of engineering, it involves number of stakeholders and requires bringing out collaborated drawings, that are simply good for construction. The actual construction is carried out based on this BIM is a three-dimensional view of the structure/building and its components.

However, the complexities of various services like Mechanical, Electrical, Plumbing, Instrumentation, Fire-fighting system and Automation Systems etc., often result in the following while execution.
Coordination issues among the Engineering services can result in clashes between the services and may lead to delay of construction, and also

  • BOQ and BOM need to be created manually, which take more time and may not be accurate.
  • Improper Space Management for Services, as there is no collaborated drawing that exists to guide them.
  • As Built Drawings are not automatically generated, which is very important during the handover of the project and for the facility management.
  • Reconciliation of material quantities, balance cost to come, PRW bills, client bills, and actual versus planned reports –all of these are dependent on the skill and knowledge-level of quantity surveyors, which generally istime-taking and not solid on


All the above issues are not resolved during engineering stage and only reflect during construction period, thereby resulting in huge loss of time and cost overrun. BIM can help in the following:

  1. BIM provides 100% clash-free model and Good For Construction (GFC) or Issue For Construction drawings, resulting in saving of rework, time, and cost.
  2. BIM provides accurate bill of qualities and bill of material for various civil activities like Concrete, Reinforcement, Formwork/shutting, Brickwork, Plastering, Flooring, Painting, Doors and Windows ,
  3. BIM provides accurate bill of quantities for MEP Services like number of elbows, tees, flanges, traps, fixtures, supports, lights, switches, sockets, gauges, accessories etc. and length for pipes, Ducts, Cable trays, conduits etc.
  4. BIM provides 100% accuracy of quantities, as the quantities are generated automatically from model.
  5. BIM takes less time to generate balance quantiles for any item or services with 100% accuracy, at any given point of time, which will help in exact cost estimation for balance work.
  6. Subcontractor or vendor bill verification and certification can be carried out in a very short period with 100% accuracy, while avoiding duplication of measurements or missing out on quantities
  7. Client billing can be generated in a short period with more accuracy, which avoids losing unmeasured work done quantities.
  8. Reconciliation of materials and bills can be generated in a short period while avoiding possible misappropriation.
  9. Due to accurate BOQ and materials, tracking of material inventory is robust, and one can avoid ordering of extra quantity of materials and accountability clearly visible.
  10. Engineering Advantages:
  • BIM optimizes duct, pipe, cable tray and conduit routings, so that wastage can be avoided.
  • BIM avoids assumptions and imagination in construction, so accurate construction will happen according to engineering design. Hence BIM will control deviations during construction.
  • BIM avoidsclashes among all services as the model is generated, collaborating all the various services like architecture, structure and MEP etc., together that is super-imposing of all design drawings in the form a virtual 3D This will result in generating accurate clash-free construction drawing and also saves engineering man hours.
  • Since model is updated on every small change that takes place during engineering or construction, As-Built drawings are generated automatically, which helps in handing over the facility to both client and facility management team.
  • Drawings which are extracted from BIM in LOD 400 are so detailed that even an un-trained engineer can easy follow and implement in execution.
  1. Project Monitoring:
  • Project scheduling can be prepared in the BIM model on daily, weekly, fortnightly, and monthly basis with quantification and time
  • Monitoring of schedule can be verified or compared with respect to actual progress achieved during the respective period and quantity.
  • Budget can be prepared for any particular schedule and can be compared with actual achievement with respect to cost very effectively, as quantities are generated most accurately.
  • Drawings and physical progress can be viewed with timelines, which is documented automatically in BIM model which is helpful while handing over the asset to operation and maintenance team, and client based on which the final bills of contactor will be cleared.