Shopping Cart Data Flow Diagram (DFD)

Shopping Cart Data Flow Diagram (DFD)

The Shopping Cart Data Flow Diagram (DFD) represents the “flow” of data in all processes present in shopping cart. This data flow diagram for Shopping cart is also known as DFD. It has three levels that elaborates the flow of data.

The Shopping Cart Data Flow Diagram (DFD) is made up of data (input and output), entities (users), data store, and processes. It uses symbols to define the overall flow of data.

Shopping Cart Data Flow Diagram: Project Name and Details

The table shows the project name and details of Shopping Cart Data Flow Diagram. It has the complete information about the project’s information.

Name:Shopping Cart Data Flow Diagram
Abstract:The Shopping Cart Data Flow Diagram (DFD) shows the structure of the project 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 also known as DFD
Users:Seller, Buyer (Customers), and Admin
Tools Used:You may use any Diagram tools that provides data flow diagram symbols.
Shopping Cart Data Flow Diagram (DFD) – Project Name and Details

Shopping Cart Data Flow Diagram Definition

The Shopping Cart Data Flow Diagram is one of the methods used for project development. It represents the system’s major process and alternatives that generate the flow of data within the project. The data included were labelled properly to guide programmers and users about the structure of Shopping Cart.

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Importance of Data Flow Diagram for Shopping Cart

The importance of the Data Flow Diagram for Shopping Cart is that it aids the audience in understanding what is happening in the system. This is done by helping them visualize the system’s data management at various levels of elaboration.

The shopping cart data flow diagram involves major levels to elaborate the flow of data within the project. These levels has their part in expounding the details of the system’s data flow structure. This structure will be the guide of developers in designing the DFD (Data Flow Diagram).

The data flow diagram describes the flow of data in Shopping Cart. It denotes the steps involved in transferring data from the input to file storage and report output in a system.

Advantages of Shopping Cart Data Flow Diagram

The Advantages of Shopping Cart Data Flow Diagram are as follows:

  • It is a visual representation that is very simple to comprehend because it aids in the visualization of contents.
  • Included in the system documentation file.
  • Simple to grasp and data flow diagrams can be understood by both programmers and users.
  • Data Flow Diagrams are detailed and well-explained diagrams of system components.
  • It aids in comprehending a system’s operation and limitations.

Shopping Cart Data Flow Diagram Example

The Shopping Cart Data Flow Diagram Example is given with explanation. This example Data Flow Diagram are elaborated in three Levels which were the DFD Level 0, 1, and 2.

Level 0 DFD Diagram for Shopping Cart

The Level 0 DFD Diagram for Shopping Cart is also known as the context diagram. It is composed of the main process, users and data flows. The concept is shown in a 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 depicts Shopping Cart Project at a high level.

Data Flow Diagram (DFD) Level 0 for Shopping Cart
Level 0 DFD Diagram for Shopping Cart

The illustration presents the main process in a single node to introduce the project context. This context is explaining how the project work in just one look. The users feeds data into the system and then receives the output from it.

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. This could also be modified to meet the other requirements and could include other matters regarding with Shopping Cart management.

DFD Level 1 Diagram for Shopping Cart

DFD Level 1 Diagram for Shopping Cart is considered as the detonated view of context diagram. Its function is to deepen the concept derive from the context diagram.

The DFD Level 1 shows the wider details of Shopping Cart DFD Level 0. This is to clarify the paths (flow) of data and its transformation from being an input to an output.

Data Flow Diagram (DFD) Level 1 for Shopping Cart
Level 1 Data Flow Diagram (DFD) for Shopping Cart

The designed diagram portrays two different scenario which is the product management and the ordering. The flow of data starts from the seller and the customer then the system caters it. This ideas were based on shopping processes or transaction.

You can also see the data store used or the database. The database is used as the storage of the data processed and given by the users and then it also serves as the source of outputs.

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

Level 2 DFD for Shopping Cart

Level 2 DFD for Shopping Cart is also called as the highest abstraction of data flow diagram. This level also broadens the idea from the DFD level 1. It includes the sub-processes from level 1 as well as the data that flows.

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

How to build Data Flow Diagram for Shopping Cart

Time needed: 5 minutes.

Steps in building a Data Flow Diagram for Shopping Cart.

  • 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 : 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 : Any procedure that modifies data and generates an output. It might execute calculations, sort data according to logic, or direct 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. Each data storage is given a basic label, such as “Orders.
    Data Flow : The path taken by data between external entities, processes, and data repositories It depicts the interface between the other components. It is 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 Shopping Cart which works as an online shopping website or app. Then your users would be the admin, sellers and customers. You may ask the users of the common activities that they do when doing task in shopping. 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 online shopping. 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 plot the Data Flow diagram, you need to place first the users involved and the main processes 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 Shopping Cart. That is to help you create a fully-functional system with use of DFD. 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 Shopping Cart Data Flow Diagram (DFD), just leave us your comments below. We would be glad to hear to concerns and suggestions and be part of your learning.

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