The document highlights the importance of planning. It proposes that the extension service must plan and programme its activities if it is to function efficiently as is the case for the national sectional plan for agriculture and a plan for research and technological generation. Planning is important because it permits a rationalization of work, seeking the most scientifically valid, economical and effective way of attaining the goals. The documents contains information on the planning process; elements of the programming and evaluation process; diagnosis of the situation; formulation of priorities and objetives; stating operational objetives; defining the programme; organization; evaluation; and evaluation methods. (MIBA)