The model, in order to operate successfully, must produce a high rate of apprehension and conviction and must do so in a context where the magnitudes being dealt with are very large, and the resources for dealing with them are very limited. There must then be a premium on speed and finality. Speed, in turn, depends on informality and on uniformity; finality depends on minimizing the occasions for challenge. The process must not be cluttered with ceremonious rituals that do not advance the progress of a case. Facts can be established more quickly through interrogation in a police station than through the formal process of examination and cross-examination in a court; it follows that extrajudicial processes should be preferred to judicial processes, informal to formal operations. Informality is not enough; there must also be uniformity. Routine stereotyped procedures are essential if large numbers are being handled. The model that will operate successfully on these presuppositions must be an administrative, almost a managerial, model. The image that comes to mind is an assembly line or a conveyor belt down which moves an endless stream of cases, never stopping, carrying the cases to workers who stand at fixed stations and who perform on each case as it comes by the same small but essential operation that brings it one step closer to being a finished product, or, to exchange the metaphor for the reality, a closed file.