Understanding Data Flow Diagram (DFD) Levels and Levelling Criteria
Introduction Data Flow Diagrams (DFDs) are a powerful tool for visualizing and understanding the flow of data within a system. To effectively represent the complexity of a system, DFDs are organized into different levels. In this article, we will explore how to determine the levels of a DFD and discuss the criteria for deciding how many levels a system should have. Levels of DFD Context Diagram The starting point of any DFD is the context diagram. It provides an overview of the entire system, showcasing the interactions between the system and its external…continue reading →