Top-Down Planning is a method of planning, defining objectives and ways to achieve them through the top down. First, global (framework) goals are set, and ways how to achieve them. They are gradually moved to lower and lower levels of the organizational hierarchy to be developed and specified. It is therefore a divergent approach.
Top-Down Planning in practise: The disadvantage is a unidirectional process, so in the planning system lacks feedback. This overcomes the limitations planning bidirectional planning (Top-Down/Bottom-Up).