Data Flow Diagram Online

Visual software to draw and collaborate on ideas, concepts and processes. Use it as a chart and diagram maker/collaboration tool/visual space. Flow Chart is a great visualization tool for the flow of a process, algorithm or procedure with a lot of benefits. It is convenient to use a powerful software for creating flow charts. Now we have the best flow chart maker online design software - ConceptDraw DIAGRAM enhanced with Flowcharts Solution from the 'Diagrams' Area of ConceptDraw Solution Park. Data flow diagrams are best suited for explaining processes and systems that are difficult to describe using text, making presentation mode essential as you help stakeholders interpret and understand the data flow path of any process. Use the in-editor presentation mode in our data flow diagram maker to easily present complex technical systems. VP Online is your all-in-one online drawing solution. Create professional flowcharts, UML diagrams, BPMN, ArchiMate, ER Diagrams, DFD, SWOT, Venn, org charts and mind map. Works cross-platforms: Mac, Windows, Linux. Sign-up for a FREE account today! Data Flow Diagram (DFD) is a diagram that shows the movement of data within a business information system. A DFD visualizes the transfer of data between processes, data stores and entities external to the system. It's widely used in software engineering for years. Now, you can draw professional Data Flow Diagram with Visual Paradigm's online.

Hotel Room Booking System Data flow diagram is often used as a preliminary step to create an overview of the Hotel Room without going into great detail, which can later be elaborated.it normally consists of overall application dataflow and processes of the Hotel Room process. It contains all of the userflow and their entities such all the flow of Hotel, Room Facility, Room Category, Booking, Payment, Customer, Hotel Employee. All of the below diagrams has been used for the visualization of data processing and structured design of the Hotel Room process and working flow.

Zero Level Data flow Diagram(0 Level DFD) of Hotel Room Booking System :

This is the Zero Level DFD of Hotel Room Booking System, where we have eloborated the high level process of Hotel Room. It’s a basic overview of the whole Hotel Room Booking System or process being analyzed or modeled. It’s designed to be an at-a-glance view of Payment,Customer and Hotel Employee showing the system as a single high-level process, with its relationship to external entities of Hotel,Room Facility and Room Category. It should be easily understood by a wide audience, including Hotel,Room Category and Payment In zero leve DFD of Hotel Room Booking System, we have described the high level flow of the Hotel Room system.

High Level Entities and proccess flow of Hotel Room Booking System:

  • Managing all the Hotel
  • Managing all the Room Facility
  • Managing all the Room Category
  • Managing all the Booking
  • Managing all the Payment
  • Managing all the Customer
  • Managing all the Hotel Employee

First Level Data flow Diagram(1st Level DFD) of Hotel Room Booking System :

First Level DFD (1st Level) of Hotel Room Booking System shows how the system is divided into sub-systems (processes), each of which deals with one or more of the data flows to or from an external agent, and which together provide all of the functionality of the Hotel Room Booking System system as a whole. It also identifies internal data stores of Hotel Employee, Customer, Payment, Booking, Room Category that must be present in order for the Hotel Room system to do its job, and shows the flow of data between the various parts of Hotel, Room Category, Customer, Hotel Employee, Payment of the system. DFD Level 1 provides a more detailed breakout of pieces of the 1st level DFD. You will highlight the main functionalities of Hotel Room.

Main entities and output of First Level DFD (1st Level DFD):

  • Processing Hotel records and generate report of all Hotel
  • Processing Room Facility records and generate report of all Room Facility
  • Processing Room Category records and generate report of all Room Category
  • Processing Booking records and generate report of all Booking
  • Processing Payment records and generate report of all Payment
  • Processing Customer records and generate report of all Customer
  • Processing Hotel Employee records and generate report of all Hotel Employee

Second Level Data flow Diagram(2nd Level DFD) of Hotel Room Booking System :

DFD Level 2 then goes one step deeper into parts of Level 1 of Hotel Room. It may require more functionalities of Hotel Room to reach the necessary level of detail about the Hotel Room functioning. First Level DFD (1st Level) of Hotel Room Booking System shows how the system is divided into sub-systems (processes). The 2nd Level DFD contains more details of Hotel Employee, Customer, Payment, Booking, Room Category, Room Facility, Hotel.

Low level functionalities of Hotel Room Booking System

Data flow diagram online
  • Admin logins to the system and manage all the functionalities of Hotel Room Booking System
  • Admin can add, edit, delete and view the records of Hotel, Room Category, Payment, Hotel Employee
  • Admin can manage all the details of Room Facility, Booking, Customer
  • Admin can also generate reports of Hotel, Room Facility, Room Category, Booking, Payment, Customer
  • Admin can search the details of Room Facility, Payment, Customer
  • Admin can apply different level of filters on report of Hotel, Booking, Payment
  • Admin can tracks the detailed information of Room Facility, Room Category, Booking, , Payment

What is Data Flow Diagram?


A data flow diagram (DFD) is used to represent the flow of information within a system visually. Hence, you can draw data flow diagram to show how information leaves and enters into a system, how it is used and where it is kept. For drawing data flow diagrams, different symbols and shapes are used, which are known as notations. The DFD or context flow diagram is commonly used in software engineering, business analysis, agile development, system structures, etc. While you can draw a DFD by hand, it is best to use an online DFD maker.

In today’s article, we will tell you how to make a data flow diagram quickly and easily.

Symbols and Notations Used in DFDs

The DFDs are drawn with the help of certain symbols and notations which depict the components of a flow chart. Therefore, to discuss the symbols and notations, we must know about the components of DFD, which are:

  • External Entity – an outside system that transfers and receives data with the main system.
  • Process – Any series of steps that change the input data to produce output.
  • Data Flow – This is the route that the data goes through within a system.
  • Data Store – Location of files/repositories that hold or store the data.

Here are the symbols and notations used in DFDs:

  • Yourdon and Coad
  • Yourdon and DeMarco
  • Gane and Sarson

Image Source: lucidchart.com

How to Make a Data Flow Diagram

Edraw Max Online is an online DFD maker that can be used to create data flow diagrams online. Follow this DFD tutorial step by step to create data flow diagrams online in Edraw:

Data Flow Diagram Online Shopping

Step 1 – Open Edraw Max Online

Open Edraw Max Online by opening this link: https://www.edrawmax.com/online/ on your browser.

Step 2 – Open Flowchart

On the navigation pane on the left side of the screen, scroll down to Flowchart. Click on the Data Flow diagram and wait for the templates to load. Now you will choose a free template or create a DFD yourself by using a blank template.

Step 3 – Create a DFD

Once you click on any template (blank or pre-designed), a new Edraw Online tab will open up in the browser. To create a Data Flow diagram with the help of a pre-made template, just edit and customize the template until you are happy with the results.

Data Flow Diagram Online

Now to make the DFD from scratch, start creating your diagram on the blank sheet. To use symbols, drawing and other visual tools, use the Symbol Library. Click on the icon next to Symbol Library on the left side of the screen. Now search for more symbols and icons in the Library pop-window. Scroll down to the Flowchart and select the DFD symbols. Finally, click OK to add it to your symbol library on the left.

You can use these symbols and shapes to create a DFD. Display them on the drawing page and use them with connection lines to draft the chart. Arrange the symbols to portray all the notations of the DFD, i.e., data flow, external entity, data store, and process. To add any object on your drawing page, select it, drag it towards the page and them place it wherever you want it.

Step 4 – Customize your DFD

Keep formatting your data flow diagram according to your needs. Once you are satisfied with the final results, close the format Tab and Symbol library on each side of the screen by clicking on << and >> symbols.

Step 5 – Save your File

Data Flow Diagram Online Shopping

Once you have completed the DFD, you can save it for later edits or online sharing. You can save it as commonly-used file types such as Excel, Word or PDF. To save an Edraw file in another software, click on File and then go to Export.

More Free Data Flow Diagram Templates

ATM System Data Flow Template

This ATM System Data Flow Template can be used to discuss and analyze how data flows through different terminals in an ATM to process transactions. This template is editable and customizable; hence, different banks can use it make it their own with just a few simple tweaks here and there.

Click here to free download ATM System Data Flow Template.

File Analysis Data Flow Template

With the help of this File Analysis Data Flow Template, users can analyze and study different types of files. It is simple and easy to edit; hence, anyone can use it for any purpose. So, download this File Analysis Data Flow Template right now and make a grand data flow diagram in just a few steps.

Click here to free download the File Analysis Data Flow Template.

Reservation Data Flow Template

The File Analysis Data Flow Template is a simple template to explain the process of making reservations. Though it is a simple task, it still has a flow of data to make sure everything happens smoothly. With this template, you can create a context flow diagram in just a few minutes.

Click here to free download Reservation Data Flow Template.