Functional decomposition is a critical process used in System Engineering to break down complex systems into smaller, manageable components. While the term "functional decomposition" is commonly used in the field of engineering, there are several synonyms used to describe the same process. Some commonly used alternatives to functional decomposition include the System Breakdown Method, Hierarchical Analysis, and Top-Down Design. Other related terms include "modular decomposition," which describes the process of breaking down systems into independently functioning modules, and "function modeling," which involves visualizing a system's components and their interactions in a structured way. Ultimately, regardless of the term used, the goal of functional decomposition is to make complex systems more manageable and easier to analyze.