OPTS programs were initiated in 1994 as 3-year demonstrations in five communities: Kansas City (Missouri), New York City, Oakland, St. Louis, and Tampa. OPTS paired local probation and parole departments with lead service agencies that provided case management and other services. Treatment and supportive services were delivered directly to adult probationers and parolees, and limited assistance was provided to their families or domestic networks. The program evaluation used an experimental model that randomly assigned eligible felons to either the OPTS program (treatment group) or routine supervision (control group). Evaluation findings showed a high degree of variation among sites in terms of program implementation. Major components of the OPTS model are described, including aspects of case management and supervision and core services offered to OPTS clients. Selected service utilization attributes and outcomes are also assessed, with consideration paid to the use of specific services (housing, family skills training, and education), the variety and comprehensiveness of services supporting individuals, service intensity, and recipient satisfaction with services. Additional information on the program evaluation is appended. 26 references and 20 exhibits