SSA conducts the PER to meet statutory requirements of the Act. Section 221(c) of the Act requires SSA to review at least 50 percent of favorable Title II and concurrent
                  Title II/Title XVI initial and reconsideration determinations made by adjudicating
                  components on a pre-effectuation basis.
               
               Section 1633(e)(1) of the Act requires SSA to review at least 50 percent of favorable Title XVI adult
                  initial and reconsideration determinations made by the adjudicating components on
                  a pre-effectuation basis.
               
               A predictive model randomly selects a sample of claims from those determinations most
                  likely to be incorrect.
               
               Favorable Title XVIII Medicare for Qualified Government Employee disability claims
                  (disabled worker, disabled widow(er), and childhood disability) are also subject to
                  PER review.