Comparing calculated quantities with Revit data

A workflow guide for preparing and reviewing a BOQ. It describes professional checks and does not promise automatic recognition, compatibility or a connection that has not been verified for the project.

AiN demo: model alongside a quantity table

Check the source

Begin with the same revision and element set. Record the unit and selected field on each side. Different numbers are not necessarily an error if one side represents gross area and the other net area or a different scope.

Incorporate the data

Start with identifiable individual elements before reviewing groups. Investigate openings, joins, filters and linked files when differences arise. A local explanation is more useful than an arbitrary adjustment to the grand total.

Review before issue

Retain a comparison table with ID, source, both values and the reviewer decision. Agreement in a sample does not prove agreement across the whole model or establish a general project accuracy percentage.

Review checklist

Identify the source file and revision.
Record the unit and measurement rule, and check scope boundaries.
Distinguish model data, manual completion and AI suggestions.
Record missing data or exceptions before using a quantity for pricing.

AiN uses AI and can make mistakes. These guides were prepared with AI assistance and have not been reviewed by Yaakov Avital; professional review is required before project use.