The Ohio Retirement Study Council (ORSC) retained IFS in 2005 to conduct fiduciary performance audits of STRS and OP&F (collectively, the Systems), two of the five statewide public pension funds in the state of Ohio, with assets of nearly $60 billion as of June 30, 2005 and $13 billion as of December 31, 2005, respectively. STRS manages approximately 77% of its assets internally while OP&F uses virtually 100% external investment management.