Model issue and filters
Identify the model revision and discipline files used for quantity extraction. Agree on phase, design option and workset filters before comparing a model count with a drawing-based takeoff.
Model-based quantity review
BIM Estimating Services
BIM estimating uses model quantities alongside the issued drawings and specifications. Record the model version and measure any missing elements from the approved bid documents or as stated allowances.
Model quantities can speed up measurement, but the bid is only as complete as the model’s coverage. We organize quantities by element or package and reconcile them with the issued plans and specifications before relying on them for pricing.
Reconcile discrepancies between the model and the issued sheets.
What this service covers
Items outside the model
List items that need measurement from details or schedules, such as supports, sleeves or finishes modeled at a lower level of detail. This is especially important when a model was built for coordination rather than quantification.
Quantity validation
Spot-check quantities against known dimensions and independent plan counts. Keep model element IDs or schedule references on disputed rows so the team can trace a quantity back to the source.
What the scope can include
- Model quantity extraction
- Element-to-cost-code mapping
- Drawing checks and manual takeoffs
- Model version and omission notes
What to send with your plans
Send the model version, the matching issued drawings, schedules and the required breakdown by trade, floor or bid package.
Frequently asked questions
Do model quantities cover every item?
Coverage depends on what was modeled. Record modeled, manually measured and allowance quantities as different sources.
Can you use drawings and models together?
Yes. Use the available model as a measurement source and document discrepancies or gaps against the issued bid documents.
Request an Estimate View Estimating Samples
What the estimate can show
- Scope and quantity detail arranged by the trade, system, phase or bid item.
- Document references so scope questions can be traced to the applicable plans or specifications.
- Assumptions and exclusions kept visible, with separate pricing or allowances when requested.
Have a bid set ready?
Tell us what you need priced, which drawings govern the bid and when it is due.