Educational planners are concerned with the inflow of pupils in order to plan for adequate facilities and sufficient teachers. Statistics on repeaters, however, enable the determination of the flow of pupils through and from the educational system. Since repeaters cost educational systems double in the form of expenses for teachers and equipment, statistics on repeaters can be used in the educational planning process. Reasons for the incidence of repeaters may be traced by means of an analysis of the statistical data. Repeater statistics also make a valuable contribution by increasing the accuracy of the determination of the supply of manpower according to educational level. A technique for representing pupil flow and an extension of the technique in order to determine the supply of manpower are both demonstrated. (Author/MLF)