The need to develop managerial and technical personnel in the cement, fertilizer, pulp and paper, sugar, leather and shoe, glass, and metal processing industries of various nations was studied, with emphasis on necessary steps in developing nations to relate occupational requirements to technology, processes, and scale of output. Estimates were based on comparable industries in the more industrialized nations. These were among tentative conclusions: (1) the experiences of more highly developed economies provide a reasonably reliable basis for estimating skilled personnel requirements in certain industries; (2) currently popular methods of estimating requirements may be too generalized to shed much light on variations in manpower utilization; (3) the prevailing preoccupation with quantities of skills needed for industrialization seems to have obscured the problem of accurately identifying other variables that determine the types of skills needed; (4) manpower planning perspectives should be broadened, beginning with systematic collection of sociological data on prevailing modes of behavior in monindustrial societies. (Included are references, tables and figures, and a proposed apprenticeship plan.) (ly)