Airline Reservation System DFD Levels 0, 1, and 2

The DFD (Data Flow Diagrams) focus mainly on the data that flows inside the Airline Reservation System Project. That is why the DFD has three main levels that emphasizes the data handling from the main process up to the specific processes. Airline Reservation System DFD Level 1 (context diagram) illustrates the main process, users (external entities), the data and its flow. DFD Level 1 is the broaden Context Terms and the Level 2 shows the databases that will serve as the data storage.

Watch the video here to view the full illustration of Airline Reservation System Data Flow Diagram Level 0, 1, and 2

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Here’s what you need to know.

The Data Flow Diagram (DFD) represents the flow of data and the transformations in Airline Reservation System. In the DFD, input, processing, and output are used to represent and define the overall system.

Upon reading through this article about Airline Reservation System you’ll then find how the system react with the user and handles data that the system is receiving from the customers .

The following are the data included in Airline Reservation System DFD:

Customer Information
Reservation Records
Date of Reservations
Reservation Status
Transaction

These potential inputs (data) can also be seen in other diagrams that builds up the whole system. Since Systems were not just about the data inputs and outputs but also the processes. So to create a well-engineered Airline Reservation System, aside from DFD you can also use UML diagrams that follows to furnish your project. We have:

To have an advance knowledge about the Airline Reservation System, you must be familiarize with these symbols:

Airline Reservation System Data Flow Diagram (DFD) Levels 0, 1, and 2

Time needed: 10 minutes

Here’s the Data Flow Diagram levels 0, 1, and 2 for Airline Reservation System and step-by-step way on how to create the Airline Reservation System DFD.

Airline Reservation System DFD Level 0
To start with, let us familiarize what is Airline Reservation System DFD level 0.

The Airline Reservation System DFD level 0 is also known as context diagram. It’s supposed to be an abstract view, with the mechanism represented as a single process with external parties. This DFD for the Airline Reservation System depicts the overall structure as a single bubble. It comes with incoming/outgoing indicators showing input and output data.

In this data flow diagram you will see the general process done in Airline Reservation System monitoring. This will also serve as a guide as you go through the deeper processes of the Airline Reservation System data flow diagrams.

As you see, when you build the levels of data flow diagrams, the connections of the transactions and data also broadens and gets more specific.
Airline Reservation System DFD Level 1
Next to the context diagram is the level 1 data flow diagram. The content of Airline Reservation System DFD level 1 must be single process node from the context diagram and is broken down into sub processes. In this level, the system must display or reveal further processing information.

These procedures require information such as record of customers, reservations, payment, transaction and revenue from which served as the bases for the Airline admin to manage the Airline Reservation System. This type of data is represented by a data store.

With being knowledgeable about the DFD level 1 of the Airline Reservation System, you will know then its broaden context terms. In addition to that, this may also serve as your reference on how the inputs or data fed on the system. Then you will be also informed about the outputs that the system gives.

These processes shown in the DFD were all based on the concept of Airline Reservation System.
Airline Reservation System Level 2
After presenting the Airline Reservation System DFD levels 0 and 1, next to that is level 2.

Here’s what you need to consider in creating data flow diagram level 2 for Airline Reservation System.
• The Level 2 DFD for the system should represent the basic modules as well as data flow between them.
• Since the DFD level 2 is the highest abstraction level, its Airline Reservation System processes must be detailed that is based on the DFD level 1.

Finally, after figuring the processes given in the system, the user will now have their request being processed.

DFD level 2 let’s you know the ideas on where does the data inputs goes and inputs comes within the Airline Reservation System. Considering the the data flow levels mentioned above, you can determine well the importance of breaking the processes into more specific manner.

The presented level not only shows you the detailed processes of system, but also gives you precise destination of the data that flows in the system. This DFD will also be your references as you make and design your own project DFD levels 0, 1 and 2.

Additional Knowledge on Airline Reservation System DFD Levels 0, 1, and 2

Airline Reservation System DFD level 0

A context diagram is another name for it. With the mechanism represented as a single process and external parties it will be an abstract view. It depicts the overall structure as a single bubble with incoming/outgoing indicators showing input and output data.

The data flow diagram level 0 also considers the entire system to be a single process and emphasizes the system’s interaction with external entities. Context diagrams (DFD level 0) are diagrams in which the entire system is represented as a single process.

Airline Reservation System DFD level 1

DFD Level 1 provide a broad overview but go into greater depth than a context diagram. The single process node from the context diagram is broken down into sub processes in a level 1 data flow diagram. The System level 1 DFD lists all of the major sub-processes that make up the entire system. A level 1 DFD can be thought of as a “detonated view” of the context diagram.

A single production node and its relationships to external entities are depicted in Level 0 data flow diagrams. Level 1 DFDs provide a broad overview but go into greater depth than a context diagram. The single process node from the context diagram is broken down into sub processes in a level 1 data flow diagram.

Airline Reservation System DFD level 2

The DFD Level 2 delves even deeper into the concepts of DFD level 1. It can be used to plan or record all of the specific/necessary information about how the system works. DFD Level 2 is the DFD’s highest abstraction level and represents the system’s basic modules as well as data flow between them.

Conclusion

So that completes our discussion fellas! And I hope that this Airline Reservation System Data Flow Diagram (DFD) Levels 0, 1 and 2 will help you a lot.

Now let me ask you something. What have you learned through the discussion? May this article help you with your projects in the future!

If you have inquiries or suggestions about Airline Reservation System Data flow Diagram Levels 0 1 2 just leave us your comments below.

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Airline Reservation System DFD Levels 0, 1, and 2