DFD for Online Food Ordering System

Online Food Ordering System DFD is a diagram that illustrates the overall flow of data in a project. It must be includes in your project documentation as the foundation for project development.

A data flow diagram (DFD) represents the information flow for any process or system. It shows data inputs, outputs, storage points, and the routes between each destination using defined symbols such as rectangles, circles, and arrows, as well as short text labels.

DFD for Online Food Ordering System: Project Name and Details

Name:DFD for Online Food Ordering System (Dataflow Diagram)
Abstract:The DFD of Online Food Ordering System shows the structure of the project in terms of its data management. It contains the important details on the flow of data and alternatives present in the project.
Diagram:DFD also known as Data Flow Diagram
Users:Customer, Seller, and Admin
Tools Used:Diagraming tools that provides data flow diagram symbols.
DFD of Online Food Ordering System: Project Name and Details

What is DFD of Online Food Ordering System

DFD of Online Food Ordering System this is frequently use as a preliminary step to create an overview of the application without going into great detail, which can then be elaborated. It typically consists of overall application dataflow and food ordering processes.

The DFD (Data Flow Diagram) of Online Food Ordering System shows the overall flow of data inside the system. Its focus is in the movement of data that enters and exits the system.

What 0 level DFD of Online Food Ordering System

What 0 level DFD?

It is also referred to as a context diagram. It is intended to be a conceptual view, with the system illustrated as a single process with relationships to external entities. Moreover, it displays the entire system as a single bubble with incoming and outgoing arrows indicating input and output data.

Context diagram (0 level DFD) represents the system’s general process with external entities into single node. And then, it shows the overall structure with labeled arrows indicating the input and output data. In addition, its illustration shows the main process (represented by a box), the external entities and the data flow inside the system.

The system’s Input and Output are displayed at this level. Moreover, with input and output at this level, the system is designed and established all over the world. The following information is fed into the Food Ordering System food order is entered as the customer’s food order.

What Online Food Ordering DFD level 1 and 2

What is a Level 1 DFD?

First Level DFD (1st Level) of Online Food Ordering System shows how the system is divided into sub-systems (processes), each of which deals with one or more data flows to or from an external agent, and which together provide all of the Online Food Ordering System system’s functionality.

What is a Level 2 DFD?

The DFD Level 2 represent the database or data storage used to secure all the data that moves inside the system. Further, after presenting the Online Food Ordering system DFD levels 0 and 1, next to that is level 2. Considered as the highest abstraction level, DFD Level 2 is the detailed version of DFD level 1.

A level 2 DFD describes each of the major sub-processes that comprise the entire system. Similarly, a level 2 DFD can be thought of as a “exploded view” of the context diagram. It basic system modules and data flow among various modules Level 2 DFD also mentions fundamental processes and information sources.

Why Data flow Diagram DFD of Online Food System is Important?

The most importance function of Data flow Diagram DFD Online Food System is it helps the audience in understanding what is happening in the application. Also how the system manages its data at different levels of detail.

The Data Flow Diagram Levels importance has their roles in emphasizing the Online Food Ordering System Data Flow Diagram. Furthermore, the Level 0 or Context Diagram presents the single and main process of System as well as the main users and the data, whereas the Data Flow Diagram Level 1 and 2 portrays specific process and sub processes and the detailed movement of data.


It is very important for you to know the diagrams that used to design and build the Data Flow Diagram DFD Online Food Ordering System. That is to help you build a fully-functioning system with the help of DFD, so that you can use it.

Creating a DFD will help you see what inputs and outputs the system needs to process and transform. Not only that, but you can also connect its diagram to other diagrams


If you have inquiries or suggestions about Online Food Ordering System DFD Data Flow Diagram, just leave us your comments below. We would be glad to know to concerns and suggestions and be part of your learning.

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