Thebuilding efficiency ratiois a key metric infacility and real estate management, used to determinehow efficiently a building's space is utilized. TheIFMA Real Estate and Property Management competency defines the formula as:
A black and white image of a circle with black text AI-generated content may be incorrect.

* Option B (Correct): This formula showshow much of the gross building area is rentable, making it a critical factor in leasing decisions.
* Option A (Common Area / Usable Area)doesnot measure building efficiency, but rathercommon area factor.
* Option C (Gross Area / Usable Area)isnot a standard efficiency metric.
* Option D (Usable Area / Rentable Area)measurestenant efficiency but not building efficiency.
Ahigher efficiency ratiomeansless wasted space and more rentable revenue.