It helps in identifying key processes, data sources, and interactions, enabling efficient design and troubleshooting. Importance of DFD for Library Management SystemĪ Data Flow Diagram (DFD) is crucial for a Library Management System as it provides a clear, visual representation of how information flows within the system. Creating a DFD Using Wondershare EdrawMax.Data Flow Diagram Example of Library Management System.Importance of DFD for Library Management System.