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Data Flow Diagram Process

Data Flow Diagram (DFD) in the structured-systems analysis


A graphical representation of the flow of data through an information system by modeling its process aspects is called a “data flow diagram”, also known as DFD. A DFD is often used as a step for creating an overview of the system without going into detail. DFDs can also be used for the purpose of the visualization of data processing being used in the structured design. Each DFD shows the way each kind of information will be input to and output from some particular system as well as in what way the data will advance through this system. It is also important to mention the place where the data will be stored. It does not show information about the timing of process or information about whether processes will operate in sequence or in parallel.

“Flow Chart” can be also used for such purpose of illustrating a flow of some particular data and they can be used instead of the “data flow diagrams”. “Flow diagrams” in general can be “Entity Relationship Diagrams” (or “ERD”), “Unified Modeling Language” (or “UML”) diagrams, “Data Flows Diagrams” (or “DFD”), “Windows and Macintosh Graphics User Interface (GUI)” design diagrams as well as “Structured Systems Analysis and Design Method” (“SSADM”). One of the most popular among them is a “data flow diagram”. “DFD”, as it was already mentioned before, is simply a graphical representation of the "data flow" in an information system. With its help you can illustrate a system overview in outline using ConceptDraw DIAGRAM

The “data flow diagram” can also be used for the illustration and so the visualization of the data processing in a structured design. All ConceptDraw DIAGRAM users can make any needed data flow diagram any time they want within only a short period of time. “Data flow diagrams” are very widely used nowadays and there is a reason for such usage: these diagrams show what particular kind of information can be input to as well as output from some particular system. These diagrams also show the way this data, which is about to be illustrated, can advance via this system. With the help of DFD you can also show where data can be stored.

Another name for “data flow diagrams” is “bubble charts”. There are “context-level data flow diagrams” which include a “Level 1 DFD” and they can be created in order to show some of the system’s details being modeled. The “Level 1 data flow diagrams” show the way some system is or can be divided into the smaller “sub-systems”, allowing to follow the way, in what each of these “sub-systems” deals with the “data flows”.

With the aid of the “data flow diagrams” you can always identify the internal data stores, which as a general rule have to be presented in a way of such diagram. These diagrams are the ones of the three perspectives of the “SSADM”. While creating such diagrams the sponsor of the project and the end user can be consulted at each of the stages of a system's evolution and it is always convenient to track this “evolution” with the help of such DFD, that is why using this type of diagram as a simple way of representing the operating system, as well as what it accomplishes with is a good way. You can also mention how the plans for this system can be implemented.

DF diagrams can be used for a purpose of providing the end user with the information about the inputting data, as well as the information in what the system can be developed both in analysis and design phases. There are different notations that can be used for drawing any of the needed data flow diagrams, mainly the “Gane and Sarson” and the “Yourdon and Coad” ones. You can use these notations for defining the different visual representations of the data flows, data stores, external entities as well as the other different processes.

“Logical Data Flow Diagram” can be also made in ConceptDraw DIAGRAM and it is useful for capturing the data flows, necessary for the system to operate, as well as describing the needed processes and the data required. “Physical Data Flow Diagram” is another type of “Data flow diagrams” which you can use to show the way in what some system is implemented at this very moment. “Physical Data Flow Diagram” is also known as a “Current Physical Data flow diagram”.

In general “Data flow diagrams” are well known and very commonly used for a reason of the need of representing some data flow in a system as a part of the “Structured Systems Analysis and Design Methodology” and these diagrams may consist of different components. These components are functions and processes, with the aid of which you can represent the actions happened in an information system. All of the main DFD elements are external entities, processes, data flow and data store. “Yourdon – de Marco” notation can be used for the purpose of illustrating the ”Data Flow Diagram” objects, which are interpreted in a way of processes transform the input data flows into the output data flows as well as data depositories serve them only for keeping the “ingoing” data and not to change them.

If you want to make any of the DFDs mentioned above, then everything you need is to download ConceptDraw DIAGRAM software and start using it. Having this application means having a great looking result after having very relaxing and entertaining process of creating any needed type diagrams, including all mentioned above. You can always use this software as well as the needed solution from ConceptDraw STORE application and you can be sure that your final result will look simply great as well as smart and professional drawings. The “Data Flow Diagrams Solution” can simplify your work of drawing the needed DFD and it definitely will be very helpful for those ConceptDraw DIAGRAM users, who intend to make a great looking and smart diagrams, including the “data flow” ones. The “Object Library” can be found in the “Data Flow Diagram Solution” from ConcepDraw STORE and it contains lots of design symbols, including all of the needed elements, such as icons, that can be used for your representing of the data flows, data storage, processes, objects as well as other data flow entities.

Data Flow Diagram (DFD) Solution

Example 1. Data Flow Diagram (DFD) Solution

The Data Flow Diagrams solution contains three vector stencils libraries with DFD symbols:

  • Data flow diagram (DFD);
  • DFD Gane-Sarson notation;
  • DFD Yourdon and Coad notation.

Use the Data Flow Diagrams solution to draw your own DFDs using the ConceptDraw DIAGRAM diagramming and vector drawing software.

Data Flow Diagram Process *

Example 2. DFD Process of account receivable

This example is created using ConceptDraw DIAGRAM enhanced with solution Data Flow Diagrams. It shows the process of account receivable.




Data Flow Diagrams Sample:

DFD Model of small traditional production enterprise
DFD Model
DFD Library - Design elements
DFD Library
Data flow diagrams
Data Flow Diagram
UML Class Diagram
UML Class Diagram

TEN RELATED HOW TO's:

Data Flow Diagram →

There are many ways to define the flow of information within a system. Structured-systems analysis method often uses data flow diagrams to show data flow, data storages and data processing visualization. These diagrams are easy to develop and quite useful. Here is a dataflow diagram presenting an example of the manufacturing process flow. The oval process shapes represent a process that controls data within the current system. The process may produce data or make some action based on data. Data flows are represented by lines. They show the movement of information through the system. The direction of the data flow is depicted by the arrow. The external entities are shown by rectangles. They represent the external entities interacting with the system. The data store objects (unclosed rectangles) are used to show data bases participating in a process flow.Data Flow Diagram *
Picture: Data Flow Diagram
Related Solution:

Data Flow Diagram Software →

When studying a business process or system involving the transfer of data, it is common to use a Data Flow Diagram (DFD) to visualize how data are processed. Being initially used exclusively in regards to the flow of data through a computer system, now DFDs are employed as the business modeling tools. They are applied to describe the business events and interactions, or physical systems involving data storage and transfer. ConceptDraw DIAGRAM is a powerful Data Flow Diagram software thanks to the Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park.Data Flow Diagram Software *
Picture: Data Flow Diagram Software
Related Solution:

Entity-Relationship Diagram (ERD) with ConceptDraw DIAGRAM  →

Database structures are usually described by ER-diagrams which represents entities as boxes with lines-connections between them. You can create any entity-relationship diagram (ERD) by means of ConceptDraw DIAGRAM using ready-to-use templates and special libraries containing all the needed symbols and shapes. Creating a model for your database from now on can take just a few minutes. ERD (entity relationship diagram) designed to show the logical structure of databases. It intended to depict the relationships between data components (entities). ERDs are a popular tool for software engineers and architects. Using ERD they can manage the every aspect of database design. Also ERD can be used as guidelines for testing and communications before software release. This diagram represents the file reference system of the WordPress web platform. Because entity relationship diagrams have such a broad application area through the prevalence of database technology, it can be applied for a wide range of users.Entity-Relationship Diagram (ERD) <br>with ConceptDraw DIAGRAM  *
Picture: Entity-Relationship Diagram (ERD) with ConceptDraw DIAGRAM
Related Solution:

Flow chart Example. Warehouse Flowchart →

If you want to find a way to understand complex things in minutes, you should try to visualize data. One of the most useful tool for this is creating a flowchart, which is a diagram representing stages of some process in sequential order. There are so many possible uses of flowcharts and you can find tons of flow charts examples and predesigned templates on the Internet. Warehouse flowchart is often used for describing workflow and business process mapping. Using your imagination, you can simplify your job or daily routine with flowcharts. Warehouse flowcharts are used to document product and information flow between sources of supply and consumers. The flowchart provides the staged guidance on how to manage each aspect of warehousing and describes such aspects as receiving of supplies; control of quality; shipment and storage and corresponding document flow. Warehouse flowchart, being actual is a good source of information. It indicates the stepwise way to complete the warehouse and inventory management process flow. Also it can be very useful for an inventory and audit procedures.Warehouse Flowchart
Picture: Flow chart Example. Warehouse Flowchart
Related Solution:

Flowchart design. Flowchart symbols, shapes, stencils and icons →

When thinking about data visualization, one of the first tools that comes to mind is a flowchart design. You can find flowchart symbols, shapes, stencils and icons easily on the Internet, but it might take time to systematize this information. Nevertheless, once you start flowcharting, you’ll love its simplicity and efficiency. This diagram consists from standard flowchart symbols, approved by ANSI (American National Standard Institute) for drawing flowcharts. A flowchart is a diagram that represents a step-by-step algorithm of any process, displaying the process stages as boxes that are connected with arrows. Flowchart design makes it clear and readable. Flowchart designed using ConceptDraw DIAGRAM flowchart software allows to make attractive and clear process presentation, it makes interpretation of the business process flow fresh and versatile. Great flowchart design view is a big advantage over the diagram created manually on a paper.Flowchart design
Picture: Flowchart design. Flowchart symbols, shapes, stencils and icons
Related Solution:

Data Flow Diagram Model →

Developing a software project supposes architecture first. To make it proper, you can use data flow diagram model in your current project. The data flow diagram represents the Model of small traditional production enterprise that is made using Yourdon and Coad notation. It shows how the data is transfered through a process. According to the notation of Yourdon and Coad a process is represented by circles and data stores are drawn using parallel lines. This DFD was created using the ConceptDraw Data Flow Diagrams solution. Using this solution one can visualize data flow accordingly to the rules of two basic notations used for data flow modeling.Data Flow Diagram Model *
Picture: Data Flow Diagram Model
Related Solution:

Accounting Flowchart Symbols →

It doesn’t matter what kind of business you have, a bar or a gym, there are common concepts for any of them. One of those concepts is accounting, and to facilitate the work with the figures, you can use accounting flowchart symbols and create a clear and representative scheme. You can create flowchart for auditing, tax accounting and even for planning your own budget. A graphical tool for displaying successive processes is flowchart. This method is mostly suited to represent an accounting process. The sequence of steps in the accounting process usually consists of standard accounting procedures, that can be depicted by using a minimal number of symbols, applied for the basic flowcharting. The advanced opportunity to create professional Accounting Flow charts is provided by ConceptDraw Accounting Flowcharts solution. It includes contains a library of accounting flowchart symbols used when drawing the accounting process flow.Accounting Flowchart Symbols
Picture: Accounting Flowchart Symbols
Related Solution:

Cross-Functional Flowchart →

There are many tools to manage a process or to illustrate an algorithm or a workflow. Flowcharting is one of those tools. However, it may be difficult to show complex processes that require multiple attributes or several people in a simple flowchart, so a cross-functional flowchart would be a solution for that situation. To create such flowchart, group processes and steps to labeled rows or columns, and divide those groups with horizontal or vertical parallel lines. It is worth mentioning that there are different types of cross-functional flowcharts, like opportunity or deployment flowchart. This diagram shows a cross-functional flowchart that was made for a trading process. It contains 14 processes, distributed through 5 lines depicting the participants who interact with the process. Also there are connectors that show the data flow of information between processes. The cross-functional flowchart displays a detailed model of the trading process, as well as all participants in the process and how they interact with each other. The lines in the flowchart indicates the position, department and role of the trading process participants.Cross-Functional Flowchart
Picture: Cross-Functional Flowchart
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