Functional decomposition is the analysis of complex systems by breaking them down into smaller simpler elements. It involves breaking down processes, systems, functional areas, or deliverables into simpler components, so that each part can be analyzed separately12. By breaking down larger components into smaller parts, it allows the organization to measure and track each work effort involved in implementing the solution. It also helps in the assessment of the effectiveness of each sub-component as it relates to other larger or smaller components3. Functional decomposition is a technique used in business analysis to facilitate the understanding and management of large and complex processes2. It is also used in systems engineering, software architecture, database theory, machine learning, and a variety of other fields2. References: 1: Functional decomposition in business analysis – The Functional BA 2: Functional Decomposition: Definition, Diagrams, and Applications 3: 10.22 Functional Decomposition | IIBA®