In a time of diminishing fiscal resources, demographic changes in probation clientele, and the changing public attitude toward correctional philosophy, it is imperative that probation services develop a formal classification system that will determine the level of supervision offered clients throughout the probation period. In the Massachusetts Probation Service's classification system, the first step involves interviewing a probation client and doing a social history investigation, so as to prepare the probation officer to diagnose the risk and need level of the client. In the second step, the probation officer works with the client to establish goals for the period of probation supervision. Thirdly, the probation officer designs an action plan that may include direct services by the probation officer, the use of community services, or a combination of both. Fourthly, time schedules and due dates are set for the implementation of the action plan. The final step involves an evaluation of the action plan every 6 months; this becomes the basis for any revision in the action plan. The principal focus of the classification system is on the needs of the client and the protection of the community. All program action derives from an assessment of these two factors case-by-case. Ten references are listed.