With a much more structured control, the top-down approach creates a plan faster by eliminating complex and time-consuming coordination tasks. … With bottom-up planning, one of the greatest advantages is having more realistic plans created directly with the employees involved.
Bottom-Up: An Overview. … Each approach can be quite simple—the top-down approach goes from the general to the specific, and the bottom-up approach begins at the specific and moves to the general. These methods are possible approaches for a wide range of endeavors, such as goal setting, budgeting, and forecasting.
Bottom-up DP is faster than top-down since it doesn’t involve any function calls. It completely depends on the table entries while in top-down DP it requires function calls and thereby causing an implicit stack formation.
A “bottom-up” approach to changes is one that works from the grassroots—from a large number of people working together, causing a decision to arise from their joint involvement. A decision by a number of activists, students, or victims of some incident to take action is a “bottom-up” decision.