Made with
ConceptDraw
DIAGRAM 15

Data Flow Diagram (DFD)

Data flow diagrams (DFD)


The Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park provides the DFD templates, examples and libraries of vector stencils for drawing the DFDs according to either Gane and Sarson or Yourdon and Coad notation using the ConceptDraw DIAGRAM diagramming and vector drawing software.

“Flow Chart” is usually used for the purpose of illustrating a flow of some particular data and it includes the term of “data flow diagrams”. “Flow diagrams” can be “Unified Modelling Language” (or “UML”) diagrams, “Entity Relationship Diagrams” (or “ERD”), “Data Flows Diagrams” (or “DFD”), “Structured Systems Analysis and Design Method” (“SSADM”) or “Windows and Macintosh Graphics User Interface (GUI)” design diagrams. One of the most popular is a “data flow diagram”. “DFD” is simply a graphical representation of the "data flow" in an “information system”. With its help you can illustrate a system overview without going into details, but in outline.

The “data flow diagram” can also be used for the visualization and illustration of the data processing in a structured design. Any of the ConceptDraw DIAGRAM users can make any needed “data flow diagram” any time they want with a simplicity and in a very short period of time having the right solution especially. “Data flow diagrams” are popular for the reason: they show what particular kind of information can be input to as well as output from a system. They also show the way how this data, which has to be illustrated, can advance via this system. With the help of “data flow diagram” you can also show where this data can be stored.

These “data flow diagrams” are also known as “bubble charts”. The “context-level data flow diagram” includes a “Level 1 DFD”, which can be created for a purpose of showing some of the system details, which are being modelled. The “Level 1 data flow diagrams” show the way some system is or can be divided into the smaller “sub-systems”. They also allow to follow the way, in what each of these “sub-systems” deals with these “data flows”. “Data flow diagram” can also identify the internal data stores. These stores usually have to be presented in a way of such diagram.

“Data flow diagrams” are the ones of the three in total perspectives of the “SSADM”. 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 tack this “evolution” with the aid of such DF diagram. Using this type of diagram, it is simpler to represent in what way this system can operate, what it accomplishes and how the plans for this system can be implemented. These diagrams can be also used for providing the end user with the information about the inputting data, in what the system can be developed both in analysis and design phases.

There are a few different notations, which you can use for drawing any of the needed data flow diagrams (for example, “Gane and Sarson”, “Yourdon and Coad” one). Use these notations to define the different visual representations for the data stores, data flows, external entities and different processes.

You can always make so-called “Logical Data Flow Diagram”, with the help of which you can capture the data flows, which are necessary for the system to operate. With this type of Data flow diagrams it is so simple to describe the needed processes as well as the data required. Another type of “Data flow diagrams” is so-called “Physical Data Flow Diagram”. With the help of this type you can show the way, in what some system is implemented at the moment and it is also known as a “Current Physical Data flow diagram”. Using it, it is also simple to show how the designer wants the system to look in the future: “Required Physical Data flow diagram”.

To sum up, “Data flow diagrams” are well known and 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”. These diagrams may consist of the different components (e.g., functions and processes), representing actions happened in an information system. All main “data flow diagram” elements are: processes, external entities, data flow and store (data store). “Yourdon – de Marco” notation can be used for illustration of the ”Data Flow Diagram” objects. These “objects” are interpreted in a way of processes transforming the input data flows into the output data flows as well as data depositories serving them only for keeping the “ingoing” data but no changing them; and “data flows” changes in external entities may not be considered.

In order to make any needed “flow chart” or “data flow diagram”, you need only to download ConceptDraw DIAGRAM software and start using it having very relaxing and entertaining process of creating any needed type diagrams, including those mentioned above. Using ConceptDraw DIAGRAM software as well as the needed solution from ConceptDraw STORE application, you can be sure that your final result will look simply great as well as professionally looking. The “Data Flow Diagrams Solution” will be very helpful for those ConceptDraw DIAGRAM users, who intend to make a great looking and smart diagrams, including the “data flow” ones. There is an “Object Library”, included in the “Data Flow Diagram Solution”. It contains lots of stencils, alongside all of the needed design symbols, such as icons, that can be used for representing data flows, processes, data storage, objects and other data flow entities.

Data Flow Diagram (DFD) Solution

Example 1. Data Flow Diagrams (DFD) Solution

You can always use this “Data Flow Diagrams” solution, which can be found and downloaded from the Software Development area of ConceptDraw Solution Park on this site, or either from ConceptDraw STORE application (which can be also downloaded from this site) for drawing your own “context-level” and other DFDs while working in ConceptDraw DIAGRAM diagramming and vector drawing software. You will definitely find the “Data Flow Diagrams” solution from the Software Development area of ConceptDraw Solution Park very useful as it provides the “DFD” templates, samples as well as mentioned vector stencils libraries for drawing the “DFDs”, according to “Gane and Sarson” or “Yourdon and Coad” notation. Get this unique software today and make sure you get the right solution so you have no problems after to make the needed diagram, but to use the pre-made examples from the solution as your drafts.

Data Flow Diagram (DFD) *

Example 2. Data Flow Diagram (DFD)

This example is created using ConceptDraw DIAGRAM enhanced with solution Data Flow Diagrams. This diagram shows one of the business processes to simplify and accelerate understanding, analysis, and representation.




Data Flow Diagrams Sample:

DFD Model of small traditional production enterprise
DFD Model
DFD Library - Design elements
DFD Library
DFD Process of account receivable
DFD Process
UML Class Diagram
UML Class Diagram




TEN RELATED HOW TO's:

BPR Diagram. Business Process Reengineering Example →

This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Business Process Diagram Solution from the Business Processes area of ConceptDraw Solution Park. The Business Process Solution is based on the standard BPMN 2.0 and includes the set of libraries of ready-to-use objects.BPR Diagram. <br>Business Process Reengineering Example *
Picture: BPR Diagram. Business Process Reengineering Example
Related Solution:

ERD Symbols and Meanings →

A database is a data collection, structured into some conceptual model. Two most common approaches of developing data models are UML diagrams and ER-model diagrams. There are several notations of entity-relationship diagram symbols and their meaning is slightly different. Crow’s Foot notation is quite descriptive and easy to understand, meanwhile, the Chen notation is great for conceptual modeling. An entity relationship diagrams look very simple to a flowcharts. The main difference is the symbols provided by specific ERD notations. There are several models applied in entity-relationship diagrams: conceptual, logical and physical. Creating an entity relationship diagram requires using a specific notation. There are five main components of common ERD notations: Entities, Actions, Attributes, Cardinality and Connections. The two of notations most widely used for creating ERD are Chen notation and Crow foot notation. By the way, the Crow foot notation originates from the Chen notation - it is an adapted version of the Chen notation.ERD Symbols and Meanings
Picture: ERD Symbols and Meanings
Related Solution:

Venn Diagram →

Venn diagrams are illustrations used in the branch of mathematics known as set theory. They show the mathematical or logical relationship between different groups of things (sets). A Venn diagram shows all the possible logical relations between the sets.Venn Diagram - Sustainable Development
Picture: Venn Diagram
Related Solution:

Check Order Process Flowchart. Flowchart Examples →

This sample was created in ConceptDraw DIAGRAM diagramming and vector drawing software using the Flowcharts solution from the Diagrams area of ConceptDraw Solution Park. This sample shows the Flowchart of the printing the elements of the binary search tree. They are printed in the order from lowest to greatest. On this diagram you can see the rectangles that represent the steps and decision points that are represented as diamonds with questions. It is necessary to make the decision that will determine the next step.Check Order Process Flowchart. Flowchart Examples *
Picture: Check Order Process Flowchart. Flowchart Examples
Related Solution:

How to Simplify Flow Charting — Cross-functional Flowchart →

In ConceptDraw DIAGRAM it really is sp simple to draw even the most complex cross-functional flowcharts. Use the RapidDraw technology and Cross-Functional libraries in ConceptDraw DIAGRAM for the best results.How to Simplify Flow Charting — Cross-functional Flowchart *
Picture: How to Simplify Flow Charting — Cross-functional Flowchart
Related Solution:

Accounting Data Flow from the Accounting Flowcharts Solution →

Accounting Data Flow from the Accounting Flowcharts Solution visually describes the financial accounting process, shows the accumulated information about transactions and events for creating the balance sheet and the final income statement. Accounting Flowcharts Solution contains also a wide variety of templates and samples that you can use as the base for your own Accounting Flowcharts of any complexity.Accounting Data Flow from the <br>Accounting Flowcharts Solution *
Picture: Accounting Data Flow from the Accounting Flowcharts Solution
Related Solution:
ConceptDraw
DIAGRAM 15