BIM Quantity Extraction
Project-defined quantities extracted from suitable structured model information.
5D BIM • QUANTITIES • COST DATA • CHANGE VISIBILITY
5D BIM Quantity & Cost Information Services
Connect structured BIM models with project quantity, package and cost information — supporting model-based quantity extraction, quantity traceability, design-change comparison and more controlled estimating and cost-data workflows.
Structure
Model Information
Extract
Relevant Quantities
Align
Packages & Cost Codes
Compare
Revisions & Changes
Model-Based Quantity Information
BIM Geometry Becomes More Useful When Its Information Is Structured
A BIM model can contain measurable project elements, but reliable quantity extraction depends on how those elements have been modeled, classified and parameterized.
5D BIM workflows connect model information with quantity structures, work packages, classifications and project-defined cost information.
The objective is not simply to generate more numbers. It is to make quantity information more visible, traceable and easier to update when the design changes.
BIM Model → Quantities → Packages → Cost Information
Structured information
connected to
model-based project elements.
5D BIM Capabilities
Quantity Information Connected to the BIM Model
Scope can be structured around project disciplines, model maturity, required quantity fields and the client's cost-information workflow.
Model-Based Takeoff Support
Model elements organized to support quantity takeoff and downstream review.
Quantity Classification
Model information grouped using project-defined categories, systems or classifications.
Work Package Quantities
Quantity information organized according to defined construction or procurement packages.
Model-to-Cost Code Alignment
BIM information mapped to project-defined cost-code structures where required.
Design Change Comparison
Model revisions compared to identify changes affecting project-defined quantities.
Cost-Data Preparation
Quantity information structured for integration with the client's estimating or cost workflow.
Quantity Traceability
Quantity outputs maintained with clearer connection to model elements and revisions.
Quantity Model Review
Model information checked for conditions that could affect quantity extraction.
Quantity Structure
Quantities Can Be Organized in Multiple Project Dimensions
STRUCTURE 01
Discipline
Architectural,
structural,
mechanical,
electrical or plumbing.
STRUCTURE 02
Building
Multiple-building
or campus-level
quantity grouping.
STRUCTURE 03
Level
Floor-based
or vertical project
quantity organization.
STRUCTURE 04
Zone
Project-defined
area or zone
quantity grouping.
STRUCTURE 05
System
Quantity breakdown
by defined
building system.
STRUCTURE 06
Work Package
Procurement or
construction package
quantity structure.
STRUCTURE 07
Classification
Client or
project-defined classification
structure.
STRUCTURE 08
Cost Code
Model information
aligned to relevant
project cost structures.
Quantity Reliability
A Quantity Generated by Software Is Not Automatically a Reliable Quantity
BIM software can calculate model-based quantities rapidly.
But the result still depends on what has been modeled, how elements are classified, whether duplication exists, which revision is being used and what the quantity is intended to represent.
Model Scope
Quantities can only represent
information included
within the relevant
model scope.
Model Development
Early-stage models
may not contain
the detail required
for later-stage quantities.
Element Classification
Incorrect categories
or parameters can affect
quantity grouping
and reporting.
Revision Control
Quantity outputs should
remain connected
to the model revision
from which they were produced.
5D BIM Workflow
From BIM Model to Structured Quantity Information
01
Review
Assess models, project stage and quantity requirements.
02
Structure
Organize model information around required classifications.
03
Validate
Check relevant modeled content before quantity extraction.
04
Extract
Generate project-defined model-based quantity information.
05
Map
Align quantities to packages, classifications or cost codes.
06
Issue
Deliver structured quantity information for project review.
Multidiscipline Quantities
Model-Based Quantity Information Across Building Disciplines
Architecture
Project-defined
architectural model quantities
based on available content.
Structure
Structural model
quantities organized
according to agreed scope.
HVAC
Ductwork,
equipment and
project-defined mechanical quantities.
Electrical
Electrical model information
grouped where suitable
for quantity workflows.
Plumbing
Piping,
fixtures and
project-defined plumbing quantities.
Fire Protection
Modeled fire-protection
information prepared
for defined quantity requirements.
Steel
Structural steel
model information
aligned to defined scope.
Equipment
Modeled equipment
information grouped
for package and
project-data workflows.
Design Change Visibility
When the Design Changes, Quantities Can Change Too
Design revisions may alter modeled elements, system quantities, equipment counts or package requirements.
Structured BIM information can support comparison between defined model revisions so relevant quantity changes are easier to identify.
Previous Revision
Establish the
earlier model version
used for comparison.
Current Revision
Establish the
updated model version
used for review.
Quantity Difference
Compare relevant
project-defined quantities
between revisions.
Review Context
Quantity change
remains subject to
model scope and
project interpretation.
5D Project Information
Model Data In. Structured Quantity Information Out.
Typical Inputs
- Architectural BIM models
- Structural BIM models
- MEPF BIM models
- Federated BIM information
- Quantity requirements
- Work package structure
- Client classification system
- Cost-code structure
- Model revision information
- Client-provided cost data where applicable
Typical Outputs
- Model-based quantity schedules
- Discipline quantity information
- Level / zone quantity breakdown
- Work-package quantities
- Cost-code aligned data
- Quantity comparison outputs
- Revision-based quantity information
- Project-defined data exports
- Structured estimating inputs
- Quantity review information
Quantity Readiness
Before Extracting Quantities, Check the Model
Is the Required Scope Modeled?
Missing model content cannot produce complete quantity information.
Is the Model at the Right Stage?
Quantity expectations should match model development and project stage.
Are Categories Consistent?
Misclassified elements may appear in incorrect quantity groups or be excluded.
Are Required Parameters Available?
Package, classification or cost-code reporting may depend on model parameters.
Are Duplicates Controlled?
Duplicate model elements can create duplicate quantity results.
Is the Revision Defined?
Every quantity output should remain connected to the model revision used to produce it.
Quantity QA / QC
Quantity Control Starts Before the Spreadsheet
Quantity outputs can look structured and complete while still containing model-based errors.
QA therefore needs to review both the model information and the resulting quantity structure.
Model Revision
Confirm the intended
model version
before extraction.
Model Scope
Confirm relevant
model content
is included.
Element Classification
Review project-defined
categories and parameters.
Duplicate Review
Identify model conditions
that may create
duplicated quantities.
Quantity Units
Review required
measurement units
and output structure.
Output Traceability
Keep quantity information
connected to
its model source.
5D BIM Applications
Model-Based Information for Quantity & Cost Workflows
Early Quantity Review
Available model information
organized for
early-stage quantity review.
Estimating Support
Structured quantity information
prepared for
client estimating workflows.
Procurement Packages
Model quantities
grouped around
defined package structures.
Design Development
Quantity information
reviewed as
model content develops.
Design Change Review
Model revisions compared
to identify
relevant quantity changes.
Value Engineering Support
Quantity information
can support comparison
of project-defined
design alternatives.
Contractor Workflows
Model-derived information
structured for
construction package review.
Client Reporting
Structured project quantities
prepared for
agreed reporting formats.
Digital Project Controls
Quantity information
connected to
wider BIM data workflows.
Cost Responsibility
5D BIM Supports Cost Workflows — It Does Not Guarantee Project Cost
BIM can support structured quantity information and model-to-cost-data workflows.
Final project pricing, rates, escalation, procurement conditions, contractual allowances and formal cost certification remain subject to the responsible estimating, quantity-surveying and project-management professionals.
Quantity Source
Quantities remain dependent
on modeled project information.
Cost Rates
Rates should come
from the appropriate
project cost source.
Market Conditions
BIM quantities do not
determine current
procurement or market pricing.
Professional Review
Final cost decisions
remain subject to
the responsible
project cost professionals.
Related Services
Connect 5D BIM to the Wider Digital Project Workflow
Frequently Asked Questions
5D BIM FAQs
What is 5D BIM?
5D BIM connects structured BIM model information with project quantities and project-defined cost information, helping teams review model-based quantity and cost-related data.
Can quantities be extracted from Revit or BIM models?
Yes, where appropriate project elements are modeled, categorized and parameterized consistently. Quantity reliability depends on model quality, scope and development level.
Can quantity information be organized by floor or zone?
Yes. Depending on model structure and project requirements, quantity information can be grouped by disciplines, buildings, floors, zones, systems or work packages.
Can 5D BIM show quantity changes between design revisions?
Model revision comparison can support identification of project-defined quantity changes where comparable model information is available.
Can project cost codes be connected to BIM information?
Project-defined cost-code or classification information can be mapped to appropriate BIM elements where the required structure is provided.
Does model-based quantity extraction replace a quantity surveyor or estimator?
No. BIM can support quantity extraction, organization and traceability. Final estimating, valuation, rates, procurement decisions and professional cost responsibility remain with the relevant project professionals.
Model-Based Quantities
Need 5D BIM or Model-Based Quantity Support?
Share your BIM models, project stage, quantity requirements, classification structure, work packages and expected data outputs.