Extreme Measures Planmine™ Help Desk
About Us
Sign In / Up

Extreme Measures

This help desk is a free resource intended for discussion purposes only. Neither BOMA, its chapters, affiliates, or Extreme Measures Inc.® are responsible for the information, comments or opinions expressed herein. For complete information, refer to the official publications of the standards themselves.

FAQ & Read-Me Articles
What are as-built drawings / models?
What is CAD and BIM?
How do I resolve an area dispute?
Where can I get measurement standards publications?
BOMA Office Overview
BOMA Industrial Overview
BOMA Retail Overview
BOMA Multi-Unit Residential Overview
BOMA Gross Areas Overview
BOMA Mixed-Use Overview
IPMS for Office Overview
Alternative Methodologies
Glossary of Industry Terms

Building Effiecency Factor as determined by Space

William Michael
Merck & Co. Inc.
January 14, 2013

I am looking for a definition for Building effeicnecy factor as it relates to space. Is the definition USF / GrossSF ?

Adam Fingret
Extreme Measures Inc.
January 14, 2013


From our perspective, building efficiency factor would be the same as Total Rentable / Total Usable (rentable divided by usable). This will produce a building-wide load factor that describes the percentage of common area across an entire building.

That said, our view is very specific. As a term, I've seen the term "building efficiency" used in different ways.

Gordon Lindsay
September 11, 2014

I am also trying to calculate efficiency and I'm not quite sure how to relate "total rentable" and "total usable" back to the BOMA terms i am familiar with.

Does "total rentable" = total GLA
and does "total usable" = Total CGA?

David Fingret
Extreme Measures Inc.
September 16, 2014

Hi Gordon,

I'm not sure I understand your question. Usually if you divide rentable by usable, you will get the overall efficiency factor from a leasing point of view. But "efficiency" can mean different things to different people. Relating non-BOMA terms with BOMA terms is not something I can comment on. Total Rentable might not be the same as Gross Leasable Area (GLA) because GLA might have varied meanings since it is not part of any specific standard. Total Usable most likely is not equivalent to CGA (Construction Gross Area). CGA is part of the BOMA Gross Area Standard and it is usually a larger area than Total Usable.

Your Comments ...

Please allow up to 24 hours for your question to appear after it is reviewed.