The Facility Standards for campus require that all new capital construction projects achieve an energy performance that is at least 30% better than the ASHRAE 90.1. 

Specifically it states, "All building system design and construction shall be in compliance with the ASHRAE Standard 90.1. Decisions regarding building configuration and orientation, envelope construction, amount and orientation of fenestration, electrical systems, lighting, HVAC systems, etc. shall be governed by this standard. The AE shall use a computer simulation model to assess energy performance and identify cost effective energy efficiency measures. The AE shall quantify energy performance as compared to a “baseline” building that satisfies the minimum requirements of ASHRAE Standard 90.1. Each new building shall achieve a minimum 30% reduction in energy usage as compared to its baseline while major renovations shall achieve a minimum 26% reduction. ASHRAE Standard 189, Standard for the Design of High-Performance Green Buildings, and other advanced energy efficiency guides shall be referred to for additional guidance." (http://fs.illinois.edu/resources/facilities-standards/general-guidelines)

This metric represents the campus' energy efficiency requirements.  It is the required percentage better than a baseline building, for new construction.