In 1992, following a discussion with all staff members, a working party developed a plan to redesign the service based on risk and needs assessment of all probationers; the concentration of resources on medium-risk and high-risk offenders; implementation of cognitive-behavioral programs for appropriate offenders; and measurement of results as the basis for revisions in practice. Selecting an appropriate assessment instrument and preparing to deliver programs tailored to identified risks and needs took some time. Technical assistance was provided by the Cognitive Centre Foundation in South Wales and the University of Wales (Swansea). Full assessment procedures and a network of programs were in place by the summer of 1996. The chosen assessment instrument, the Level of Service Inventory-Revised, has an impressive international reputation as an evidence-based instrument. Following initial assessment of each probationer, assessments are repeated at the end of the supervision period, with an additional interim assessment at the end of structured programs. The Probation and Aftercare Service produces evaluation reports every 3 years for dissemination to relevant staff and sentencers. Two reports have been produced thus far. The essential elements of the Jersey probation evaluation process do not depend on jurisdictional characteristics and should be within the scope of any reasonably well-resourced probation service. 53 references