Between November 2001 and April 2003, data were obtained on juveniles involved in IAP's. Planning efforts by the central office of the juvenile justice agency implementing the IAP focused on program mission, policies, and procedures. All evaluated sites wanted to improve a neglected aftercare system and reduce youth recidivism and reconfinement. Attention was given to the various phases of aftercare through which juveniles advanced in the program, including initial assessment and orientation, treatment and services in the institution, prerelease and transition planning and services, and three progressive phases of postrelease supervision in the community. The mission plan and strategy, however, were compromised in efforts to implement them in the field. The innovative elements of IAP, such as intensive team case management and continuity of care over the transition period, require staff and supervisory training, ongoing skill development, close supervision, and accountability. Staff experienced in parole or aftercare may be least suited to IAP, as they find it difficult to make the adjustment to a flexible, service-oriented, team-based work setting. Those who implement the IAP must be prepared to promote and display flexibility, openness, team cohesion, and a commitment to innovation. 2 tables and 28 references