This paper summarizes results of telephone interviews with key personnel at 19 (out of 22) agencies receiving grants under the Center for Mental Health Services program, one part of a 5-year evaluation study examining the impact that utilizing measurable outcomes has on service systems. This component focused on the conceptualization and implementation of outcome-based information systems and involved interviews with sites which had and had not established an outcome information system. Results are reported across three domains: stakeholder involvement, impact on service planning and delivery, and likelihood of continuing outcome monitoring after completion of the national evaluation. Results suggest that for outcomes to have a maximum positive impact on service planning and delivery, there needs to be a high degree of overlap between the service system and the information system. (DB)