This document discusses the performance measurement requirements for core programs under the Workforce Innovation and Opportunity Act (WIOA). It outlines six common performance measures that will apply across Youth, Adult, Dislocated Worker and Wagner-Peyser programs, including entered employment, retention, median earnings, credential attainment, and measurable skill gains. It also notes a new required performance measure related to effectiveness of services to employers. Key changes from previous measures include additional lags in reporting employment outcomes, a shift to measuring median rather than average earnings, and assessing skill gains for participants while enrolled rather than at exit.