In this paper, the Policy Process Model developed by Charles O. Jones is adopted in order to analyze school desegregation policy in Portland, Oregon. A major focus of this case study is the interaction between the Portland Public School Board and two community groups (the Community Coalition for School Integration and the Black United Front) as the Board initiated adjustments in its desegregation program in order to comply with State guidelines. Also highlighted are key internal and external adjustments made by the school organization as a result of community pressures during the implementation of desegregation policy. The Jones Policy Process Model is reduced to three fundamental stages (policy formation, policy implementation, and policy impact), and the developments of each stage are outlined for the case of Portland. The blurring of boundaries between the three stages is described, and the consequent necessity for examining both the intended and unintended consequences of desegregation is stressed. (Author/GC)