Not one take-off: the same quantity from several sources, reconciled with traceability and confidence, and the variance explained. Plus value engineering and tender completeness.
A tender BOQ says 12,000 m2; Revit says 11,750; a site measurement says 9,100. Most tools show one number. The value is in explaining the difference.

Concept visual · Drawing · Excel · Site · BIM → one verified quantity
"Live" means built and tested inside the system.
From PDF, Revit and measurements to a reconciled, sourced BOQ with the variance explained.