DFDs for Online Admission System (OAS)
Welcome to KnowledgeKnot! This article dives into the Data Flow Diagrams (DFDs) for the Online Admission System (OAS). If you find this article insightful, please share it. Your support motivates us to create more valuable content for learners. Thank you!
1. Context Diagram (Level 0 DFD)
The Context Diagram provides a high-level overview of the Online Admission System (OAS). It represents the system as a single process and illustrates its interactions with external entities.
→ Purpose: Define system boundaries and external interactions.
Key Components:
→ External Entities: Applicants, administrators, and other systems interacting with OAS.
→ Single Process: Represents the entire system.
→ Data Flows: Depicts the exchange of data between the system and entities.
Example: Interaction between the applicant, OAS, and the administrator in an online admission system.
2. Detailed Diagram (Level 1 DFD)
The Level 1 DFD delves deeper into OAS processes, detailing workflows and data interactions.
→ Purpose: Show data flow between internal processes and storage.
Key Components:
→ Processes: Operations performed by OAS.
→ Data Stores: Locations for data storage, like databases.
→ External Entities: Same as in the context diagram.
→ Data Flows: Connect entities, processes, and stores.
Example: Processes like "Submit Application" and "Verify Application" are broken into manageable steps within OAS.
3. Expanded Diagram (Level 2 DFD)
The Level 2 DFD further breaks down the subprocesses in Level 1, offering a detailed view of the Online Admission System (OAS).
→ Purpose: Detailed representation for comprehensive analysis.
Key Components:
→ Processes: Specific operations within Level 1 processes.
→ Data Stores: Represented with more detail.
→ External Entities: Same as in previous levels.
→ Data Flows: Show intricate interactions within processes.
Example: Subprocesses like "Validate Details" and "Save Application" are elaborated for clarity within OAS.
Also Read:-
