E-commerce Website DFD (Data Flow Diagram)

E-commerce Website DFD (Data Flow Diagram)

DFD are diagrams used to portray the overall flow of data in the E-COMMERCE WEBSITE SYSTEM. The E-Commerce Website Data Flow Diagram shows the illustration on how would the project handle the included data. It is composed of 3 illustrations which is represented by DFD Levels. They will be tackled as we go deeper into the discussion.

Here’s what you need to know.

The Data Flow Diagram (DFD) represents the flow of data and the transformations in E-Commerce Website. The input, processing, and output are used to represent and define the overall e-commerce website data flow diagram.

E-Commerce Website Data Flow Diagram: Project Name and Details

The table shows the project name and details of E-Commerce Website Data Flow Diagram. It has the complete information about the project content.

Name:E-Commerce Website Data Flow Diagram
Abstract:The E-Commerce Website Data Flow Diagram 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:Website Admin, Sellers, and Customers
Tools Used:Diagraming tools that provides data flow diagram symbols.
E-Commerce Website Data Flow Diagram – Project Name and Details

E-commerce Website Data Flow Diagram (DFD) Level 0, 1, and 2

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Here are the diagrams that completes the E-Commerce Website Data Flow Diagram (DFD). Each of these Levels has their corresponding discussion about what are their roles in emphasizing the work of E-Commerce Website.

The mentioned DFD Levels were the DFD level 0, 1, and 2. These levels starts from the very basic concept and then it gets broader as the levels goes up. Each of the DFD levels is represented with a diagram that explains what is E-Commerce Website System Data Flow Diagram.

To design the diagrams, DFD symbols were used to identify the flow of data in the project with the users or external entities. The symbols will help you understand the work of an E-Commerce Website System Data Flow Diagram.

Level 0 DFD Diagram for E-commerce Website

The Level 0 DFD Diagram for E-commerce Website contains the basic yet general process of the system. Its purpose is to give the system analyst and programmers the basis for further process. The reason why the DFD Level were done one-by-one is to see and avoid flaws while still designing the diagram.

E-Commerce Website DFD Level 0 presents the main idea to be the basis for the proceeding levels. The basic idea is represented by a single process consisting the main process, users and data.

To design the DFD Level 0, you must look into the general aspect of your project. Figure the core concept of the system and put it in a single process to produce a context diagram. You need to determine the main process, users (external entities) and the data flow.

DFD Level 1 Diagram for E-commerce Website

The DFD Level 1 Diagram for E-commerce Website provides a broad overview and greater depth of DFD Level 0. The single process node from the context diagram is broken down into sub processes to see the included data that may enter and exits system.

E-commerce Website DFD Level 1 lists all of the included processes that make up the entire system. It is the broadened context terms that consist of several processes derived from the main process. They were also numbers to see that were all part of the single process from E-Commerce Website DFD Level 0.

Basically the content of DFD level 1 is in accord to the context diagram. It illustrates the broadened concept of the former level and explains the included data and process. These data and processes were determined to complete the function of the project.

To design the DFD level 1 of E-Commerce Website, think of the included processes that makes up the main process. Then these processes will help you know the data that needs to be handled by the system.

Level 2 DFD for E-commerce Website

The Level 2 DFD for E-commerce Website portrays deeper concepts of DFD level 1. It can be used to plan or record all of the specific/necessary information about how the system works.

After presenting the E-Commerce Website DFD levels 0 and 1, next to that is level 2. The DFD Level 2 was considered as the highest abstraction of E-Commerce Website Data Flow Diagram. This level is expected to have the complete and detailed illustration of the project.

E-Commerce Website DFD Level 2 represents the system’s specified modules as well as the data that flows between them. These modules includes the data flow, processes, external entities and the databases. Each of them serves as the guide on how to build the system.

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. Considering the dataflow levels mentioned above, you can determine well the importance of breaking the processes into more specific manner.

How to build E-commerce Website Data Flow Diagram:

Time needed: 5 minutes.

Steps in building a Data Flow Diagram for E-commerce Website.

  • Step 1: Familiarize Data Flow Diagram (DFD) Symbols

    Data Flow Diagram – describes the movement of data through a system or process. It contains data inputs and outputs, as well as data repositories and users. Their symbols and applications must be familiarized before you build the Data Flow Diagram.

    External Entity : is an external system (users) that provides or receives information and communicates with the system. They are the origins and destinations of data entering and exiting the system. They could be a third-party company or individual, a computer system, or a business system. Terminators, sources, sinks, and actors are all terms used to describe them.
    Process : is any procedure that transforms data and generates an output. It might execute calculations, sort data according to logic, or direct data flow according to business standards.
    Data Store : are database tables serves as examples of files or repositories that store information for later use. Each data storage is given a basic label, such as “Items” or “Location”.
    Data Flow : is the path taken by data between external entities, processes, and data repositories. It depicts the interface between the other components. It’s represented by arrows and labeled with a data name.

    Each of these data flow diagram symbols shows the overall data handling. Emphasizing the System’s structure would be much easier by using these Data Flow Diagram symbols.

  • Step 2: Determine the targeted users

    After the symbol familiarization, you’ll need to determine your targeted users. Your targeted users will be the ones to use your project.

    Your project is E-Commerce Website then your users would be the Website Admin, Sellers, and Customers. You may ask the users of the common activities that they do when doing task in the website. These information will help you in proceeding with the next step.

  • Step 3: Analyze the processes and data included

    Analyzation is very important in creating data flow diagram. It will help you understand the work of the diagram and avoid the unwanted errors.

    The gathered information from the users are very useful in creating the diagram. You will evaluate the data and pick the general processes.

    From the general processes, you will see the possible data that will enter and exit the system. But only include the useful data and processes related to e-commerce website. Then you’re ready for the next step.

  • Step 4: Plot the Data Flow Diagram

    To plot the data flow diagram you will need the users, processes, databases, and data flows. You will base the flow of data from the evaluated information to have the exact Data Flow Diagram.

    To do this, you’ll need to place first the users involved, main process and the data flow they will perform. This will first generate the DFD Level 0 or the context Diagram.

    Then you will deepen the idea in DFD Level 0. To perform this, you will figure the sub-processes that completes the main process. You will also add the data store that will serve as storage of the processed data. After that, you will trace the flow or path of data to know the transformations of data inputs into outputs. This will create the DFD Level 1.

    The highest abstraction of data flow diagram is the DFD Level 2. It will only be performed when DFD level 1 needs to be elaborated. This is done by adding the supporting processes in DFD Level 1. You will connect them to the existing level to give more elaboration to the Data Flow Diagram.


It is essential for you to know the diagrams used to design and develop the E-Commerce Website. That is to help you create a fully-functional system with use of Data Flow Diagram. Creating DFD will help you perceive included inputs and outputs that the system should process and transform. Not only that, you will be able to connect its diagram to other Diagrams.


If you have inquiries or suggestions about E-commerce Website Data Flow Diagram (DFD), 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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