From 2013 to 2015 the RTF maintained an active, provisional standard protocol for pump variable frequency drives. This protocol was deactivated in May of 2015 due to limited applicability and limited regional interest. In February of 2016 the US Department of Energy created a new rule and test procedure for pump systems (including pump controls if sold together). The new test procedure is based on the Hydraulic Institute's test procedure, and is used to rate pump systems with a Pump Energy Index (PEI), which provides a simpler and more consistent means to compute pump energy savings. DOE will require all pumps to be labeled by 2020. In parallel to this effort ACEEE's Extended Motor Product Labeling Initiative (EMPLI) is working toward the voluntary labeling of pump systems (similar to the PEI) in the near term. These two efforts have driven interest in the creation of this measure, which estimates the energy savings for about 3500 different UES measures.