DFD for Railway Reservation System – Data Flow Diagram

The DFD for Railway Reservation System is the overall flow of data on the project. It is used to document the transformation of data (input-output) for project development.

The railway reservation system DFD consists of DFD levels 0, 1, and 2. It also uses entities, processes, and data to define the whole system.

What is Railway Reservation System DFD?

A DFD (data flow diagram) is a methods used for railway reservation system development it is the representation of the system major processes and alternatives that generate the internal flow of data.

Additionally, the data was properly categorized to illustrate the railway reservation system structure. Take note that DFD is not part of the Railway Reservation System UML Diagrams, but they complement each other in explaining the project activities, behaviors, interactions, and structure.

Details of Data Flow Diagram for Railway Reservation System

The table shows the overview and details of the data flow diagram (DFD) for railway reservation system. It has complete information about the project.

Name:Railway Reservation System (DFD) Data Flow Diagram
Abstract:The railway reservation system data flow diagram (DFD) shows the project’s structure in terms of its data management. It contains the important details on the flow of data and alternatives done in the project.
Diagram:Data Flow Diagram (DFD)
Users:System Admin, Users, and Clients
Tools Used:You may use any Diagram tools that provide data flow diagram symbols.
Data Flow Diagram (DFD) for Railway Reservation System – Details

Definition of Railway Reservation System

The railway reservation system enables passengers to inquire about available tickets according to their location and destination, avail of ticket bookings and cancel tickets when needed, and see the status of their booked tickets and other transactions.

Importance of Data Flow Diagram (DFD)

The importance of the data flow diagram (DFD) for railway reservation system is to show the developers the actual happenings in the system. This is done by visualizing the system’s data management at various levels.

Furthermore, the DFD levels discussed the railway reservation system data flow. These levels have their part in expounding the system’s data flow structure details. It is then applied in creating Railway Reservation System ER Diagram.

Data flow diagrams describe not only the flow of data but also denote the steps involved in transferring data from one process to another. As a result, the data was transformed from input to output.

Railway Reservation System Data Flow Diagram (DFD)

A thorough explanation is provided for the example data flow diagram for railway reservation system. This example emphasizes the three DFD levels (DFD Levels 0, 1, and 2).

0 Level DFD for Railway Reservation System

The context diagram is an alternative name for the Level 0 DFD Diagram for Railway Reservation System. Users, the main process, and data flow make up its parts. Also, the project concept is demonstrated using the single process visualization.

DFD Level 0 shows the entities that interact with a system and defines the border between the system and its environment. This diagram also depicts the railway reservation system at a high level.

0 Level DFD for Railway Reservation System

The illustration presents the main process in a single node to introduce the project context. This context explains how the project works in just one look. The user feeds data into the system and then receives its output.

In addition, you will perceive through the diagram that there is already the presence of data flow. Though the process is very general, the flow of data is clear. Nevertheless, modify this diagram to meet the other requirements and include other matters regarding railway reservations.

Level 1 Data Flow Diagram for Railway Reservation System

The “detonated view” of the context diagram is Railway Reservation System Level 1. Its function is to deepen the concept derive from the context diagram.

Specifically, level 1 shows the broader details of Railway Reservation System Level 0. This is to clarify the paths (flow) of data and its transformation from input to output.

Level 1 DFD for Railway Reservation System

The designed diagram portrays four different scenarios: customer information management, reservation records management, reservation status monitoring, and transaction management.

Firstly, the flow of data starts from the railway admin, crews, and customers. Then the system caters to the transaction. This idea was based on railway reservation processes.

You can also see the data store used or the database. The database is also used in storing users’ data inputs. Then it serves as the source of outputs.

DFD Level 2 for Railway Reservation System

Level 2 DFD for Railway Reservation System is also the highest abstraction of the data flow diagram. This level also broadens the idea from the DFD level 1. It includes the sub-processes from level 1 and the data that flows.

DFD Level 2 for Railway Reservation System

However, not all of the processes in the project must have sub-processes. Only provide this diagram if needed. As long as your previous diagrams were clear and precise, this level is not required.

You can add more to this, and it is up to you how you will create your data flow diagram. Also, consider the data flow included and be precise with your information.

Railway Reservation System Data Flow Diagram Pdf

You may download the Data Flow Diagram for Railway Reservation System PDF by clicking the button below. It has the full details and discussion of the System’s Data Flow Diagram. You can also modify its content to complete your project requirements and needs.

Data Flow Diagram Notations:

To define the data flow diagram, we used DFD notations. They were presented in symbols to be understood easily. The symbols present the following:

Data Flow Diagram Symbols
Data Flow Diagram Symbols (Notation)
  • External Entity: provides or receives information and communicates with the system. They are the origins and destinations of data entering and exiting the system. Entities could also be a third-party company or individual, a computer system, or a business system. The terms used for entities are terminators, sources, sinks, and actors.
  • Process: is the part of DFD that modifies data and generates an output. It also executes calculations, sorts data according to logic, or directs data flow according to business standards.
  • Data Store: A database table or a membership form are examples of files or repositories that store information for later use. Also, this part requires proper labeling.
  • Data Flow: is the path that the data takes between external entities, processes, and data repositories. It depicts the interface between the other components. Also, a labeled arrow is used to present data flow.

These data flow diagram notations represent the total data handling. Using these Data Flow Diagram symbols would also help to draw attention to the system’s architecture in a simpler way.


In conclusion, we have discussed what we need to know to create a data flow diagram. Its main purpose is to emphasize data transformation from input to output. Along with this, DFD levels were very useful in elaborating the system.

Further, the information was appropriately categorized. It highlights the railway reservation system’s organizational structure. This documentation will not only help with the foundation of the project but also with its behavior. Check out these recommended and related articles for more!


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