Quantification and coordination reporting
Navisworks can measure quantities from models and produce the reports that keep coordination moving. Learn what quantification can and can’t do, and how to report well.
In this lesson you will
- Run a model take-off with Quantification
- Understand take-off limits
- Export quantities and reports
- Produce a useful coordination meeting pack
Quantification
In Navisworks Manage, Quantification takes off quantities from model objects into a catalogue of items and resources: counts, lengths, areas and volumes, grouped by your structure (e.g. by work breakdown). You can also do 2D and virtual take-offs for items not modelled.
Know the limits
Model quantities are only as good as the models: missing, duplicated or wrongly modelled elements produce wrong numbers. Measurement rules (how openings, overlaps and wastage are treated) must match what the cost planner expects. Always reconcile with drawings and label quantities with the model version and date.
Coordination reports
A good coordination pack is short:
- Summary: models received, versions, what was tested.
- Top issues with viewpoint images, locations, responsible party and due date.
- Progress: clash counts per test over time.
- Decisions from the last meeting and their status.
Export clash reports as HTML/viewpoint reports and issues as BCF where the team uses it.
Structuring a take-off
Organise items the way the cost plan is organised — by trade or element (e.g. substructure, frame, upper floors, roof, external walls) — so results drop straight into it. Map model properties such as category, type and level to catalogue items, and keep a note of which model versions were measured.
Quick reference
| Command / tool | How to start it | What it does |
|---|---|---|
| Quantification | Home tab (Manage) | Model take-off |
| Export quantities | Quantification workbook | Exports to Excel/XML |
| Clash reports | Clash Detective › Report | HTML/XML reports |
Common mistakes
Quantities differ from the cost plan.
Agree measurement rules; check model completeness and duplicates.
Reports list thousands of clashes nobody reads.
Report grouped issues and trends.
Taking off from models with duplicated elements.
Run a duplicates clash test first and ask authors to remove doubles.
Exercise
Take-off and report
- Take off columns (count, volume) and slabs (area, volume) from a structural model.
- Export to Excel and note the model version.
- Assemble a two-page coordination report from your last clash round.
You should end up with: A labelled take-off and a concise report.
Checklist
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Lesson quiz
Model quantities are only as reliable as the models.
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Free KitWren tools that help
- Length ConverterConvert between metres, centimetres, millimetres, kilometres, inches, feet, yards and miles.
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- Image CompressorCompress JPG, PNG and WebP images to make them much smaller — with a before/after preview and the size saved.
- Working Days CalculatorCount business days between two dates, excluding weekends and your public holidays.
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