Although the program was implemented in June 2007 and evaluated over the next year, Mathematica Policy Research (MPR), which provided technical assistance and conducted the evaluation, began work in January 2005 with an interagency steering committee of staff from a wide range of state agencies to design the model program. Three facilities were chosen that represent 23% of all inmates in Oklahoma's correctional facilities and about 36% of inmates with serious mental illness in the state: a 1,400-bed, medium-security facility for men with designated units for inmates with mental illness; a 200-bed, maximum-security facility for women with units for inmates with mental illness; and a 2,000-bed, maximum-security prison with a mental health unit.