Connect every cost to the current design.
We map model quantities into a controlled cost structure and apply the agreed rate basis. Estimates remain aligned with design maturity and revision history.
Precision must match the stage of design.
Model-based cost estimation links measured scope to rates, preliminaries, allowances and a defined cost breakdown structure. The model provides quantities and location context, while the estimate records the commercial basis applied to them.
Early models do not justify false accuracy. Missing specifications, unresolved systems and low-detail assemblies require clear assumptions, while later stages need tighter mapping and stronger reconciliation against issued information.
CNE prepares estimates appropriate to the available model and design maturity. When revisions arrive, we compare the quantity and scope changes before updating cost, allowing teams to distinguish design movement from rate or assumption changes.
Cost built on controlled inputs
Model revision, design stage, inclusions, exclusions, rate sources and pricing date are recorded before calculation.
Model quantities and non-modelled items are assigned to the agreed packages, trades, elements or cost codes.
Approved rates are applied with units, coverage and associated labour, plant or material assumptions kept explicit.
Design development, waste, preliminaries and unmodelled scope are handled separately from direct model quantities.
Quantities and mapped scope are compared between model versions to isolate additions, removals and specification changes.
CNE issues the cost summary, detailed build-up, assumptions, quantity basis and revision notes for commercial review.
An estimate that shows its workings
We use allowances where the design remains unresolved instead of presenting tentative scope as measured certainty.
Revision reporting shows whether movement came from design, pricing or an amended estimating assumption.
Missing scope is identified and priced transparently rather than omitted because no object exists to measure.
Build the estimate around the design you have.
Share the model, cost structure, rate basis and design stage. CNE will prepare an estimate with clear quantities, assumptions and revision logic.