Service 07 of 07
Quantity Surveying
Support
Cost certainty from the coordinated model – accurate quantities extracted directly from BIM, consultant estimates independently validated, and practical support with NEC information management obligations.
Our QS support gives commercial teams confidence that modelling, costing, and building will line up.
Quantities extracted directly from the model
Consultant estimates independently validated
NEC4 and NEC3 information management support
What we do
Reliable cost data straight from the coordinated model
DEW extracts accurate quantities directly from coordinated BIM models, giving commercial teams a transparent, traceable basis for cost planning and eliminating the errors that can creep into manual takeoffs.
We cross-check consultant cost estimates against model-derived quantities, catching discrepancies early so budgets are realistic and hold up through delivery.
For projects procured under NEC4, we support quantity surveyors and commercial teams with the obligations Option X10 (Information Modelling) creates. This includes producing and maintaining a compliant Information Execution Plan, meeting early warning duties where the Information Model is affected, and understanding the ownership, liability and insurance implications written into the clause. On NEC3 contracts, where these obligations arrive through Z clauses and project protocols instead, we provide the same practical support. In both cases, we translate contract requirements into working processes aligned with ISO 19650.
At a glance
- Quantities extracted directly from the model
- Consultant estimates checked for realism
- NEC4 Option X10 and NEC3 information management guidance
Standards
ISO 19650 information management
NRM cost classification
NEC4 Option X10 (Information Modelling)
Core capabilities
Three areas of focus within every QS engagement
Digital Quantification
Quantities extracted straight from the model
Extracting accurate quantities directly from BIM models for transparent and reliable cost planning, eliminating manual takeoff errors across the project lifecycle.
Transparent, model-derived costings
Cost Validation
Consultant estimates checked against the model
We cross-check consultant cost estimates against the model's quantities, catching discrepancies early so budgets hold up through delivery.
Improved decision-making at every stage
NEC Information Management Support
Contract obligations made practical
Supporting QSs and commercial teams with the information modelling requirements of NEC4 Option X10 and NEC3 equivalents – from Information Execution Plans to compliant, ISO 19650-aligned delivery.
ontract-compliant information management you can be confident in
“
Digital Engineering Works exceeded our expectations, delivering quality work on time and within budget.
Facilities Manager
– Major UK Hospital
Project Case Study
Overview
Key Deliverables
- Fully coordinated MEP BIM models
- COBie delivery
- Live hospital environment
Services Utilised
Common questions
FAQ
Have a question not answered here? Our team is happy to talk through your specific requirements.
Ask us a question →
How accurate are quantities taken from the model?
Quantities are extracted directly from the coordinated BIM model rather than measured manually, so they reflect exactly what's been designed and coordinated. They are then structured to NRM classification so they drop straight into a bill of quantities. Reliability is tied to how developed the model is, so we're transparent about it: where elements are still at early design stages, we flag those quantities as provisional rather than reporting false precision.
Do you replace our quantity surveyor?
No. We’re here to support your commercial team rather than replacing it. We provide the model-derived quantities, independent validation and information management expertise that make a QS's cost advice more robust, not a competing service.
What is NEC4 Option X10 and why does it matter?
Option X10 is the secondary option in NEC4 contracts covering information modelling. When included, it creates real contractual obligations: the contractor must submit an Information Execution Plan for acceptance, give early warning of anything that could affect the Information Model, and operate under specific liability and insurance provisions, with the client owning the model itself. Many commercial teams haven't dealt with these requirements before. We help QSs and contractors understand what's actually required and put practical, ISO 19650-aligned processes in place to comply.
Related services
Services that complement M&E Design
M&E Design Support
Buildable MEP design input
Consultant and contractor designs strengthened with practical input on installation, access and maintenance before work reaches site.
BIM / AIM Coordination
COBie, Digital Twins & FM handover
The coordinated model that every fabrication drawing is checked against.
Asset Data Management
COBie, Digital Twins & FM handover
Structured COBie deliverables, Uniclass data authoring, and Digital Twins – built on the coordinated BIM model maintained throughout the project.
WORK WITH DEW
Ready to talk about your next project?
DEW gives commercial teams cost certainty from the coordinated model, including transparent quantities, validated estimates and contract-compliant information management.