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DFD Library System

Context-level Data Flow Diagram (DFD)


In general Flow chart diagrams are the ones that illustrate the flow of some data as such data 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.

A “data flow diagram” or “DFD” is a graphical representation of the "data flow" in some “information system” and this representation is often used for creating some system overview without going into details. These “data flow diagrams” can also be used for the data processing visualization in a structured design and any ConceptDraw DIAGRAM user can make any needed “data flow diagram” any time they want. “Data flow diagrams” are also popular, because they show what particular kind of information can be input to and output from some definite system and how the data can advance via this system. With the help of “data flow diagram” you can also illustrate where the data can be stored, although you cannot show any timing of process and whether processes will operate in sequence or in parallel.

This “data flow diagram” named a bubble chart is a designing tool used in the “Systems Design” approach. The “context-level data flow diagram” includes a Level 1 DFD showing some of the system details being modelled. The Level 1 data flow diagrams show the way some system is divided into sub-systems and how each of these sub-systems deals with the data flows. Data flow diagram also identifies internal data stores, which have to be presented, and shows the data flow between different parts of the same system.

Data flow diagrams are one of the 3 perspectives of the “Structured-Systems Analysis and Design Method, or “SSADM”. Both the sponsor of some project and the end users can be briefed and consulted at each of the stages of a system's evolution. Using data flow diagram you can show the users in what way some particular system can operate, what this system accomplishes and how it can be implemented. Also you can always draw the old system's dataflow diagrams to compare to the new system's data flow diagrams, so it is obvious to see the more efficient system.

Data flow diagrams can be also used for providing a consumer with an idea of where the inputting data has an effect on the whole system’s structure from the stage of ordering to the one dispatching and reporting. Also the way, in what any system can be developed you can also determine with the aid of “data flow diagram”, which can be used in analysis and design phases of the so-called “lifecycle of systems development”.

There are different notations you can use for drawing any needed data flow diagrams (such as “Gane and Sarson” and “Yourdon and Coad” ones). You can always use these notations for defining different visual representations for the data stores, different data flows, processes and external entities.

You can also always create the logical “Data flow diagrams”, capturing the data flows, which are necessary within some system for it to operate smoothly. This kind of Data flow diagrams describes the processes, which are undertaken, the data required and so produced by each of the processes and the stores needed for holding this particular data.

Another type of Data flow diagrams is physical Data flow diagrams, that show the way how some system is implemented at some particular moment (called “Current Physical Data flow diagrams”) or how the designer wants it to be in the future (so called “Required Physical Data flow diagrams”). This “Physical Data flow diagram” may be used for describing some data elements appearing on each piece of paper, moving around the office. A Physical Data flow diagram usually includes different references to data and they are duplicated or redundant, whereas a Logical Data flow diagram captures the data flow elements within some system in a form that has neither redundancy nor duplication.

As mentioned above, Data flow diagrams are commonly used for representing data flow in a system and they are a part of the Structured Systems Analysis and Design Methodology, consisting of different components, such as functions and processes, which represent actions happened in information system. They also include the data about the external entities which represent data ingoing and outgoing within some system. Data containers represent places in system, where data can be saved for some particular period of time and the data flows points to the directions and character of data flow in the identified information system.

Main data flow diagram elements are processes, external entities, data store and data flow. Yourdon – de Marco notation can be used for presenting Data Flow Diagram objects. Objects of Data Flow Diagrams are interpreted in a way of processes transforming input data flows into output data flows and data depositories that serve only for keeping of ingoing data and do not change them and data flows changes in external entities are not considered.

In order to create such diagram, all you need is to download ConceptDraw DIAGRAM software and start using it having fun when creating any kind of needed diagrams, having great looking final result. Our Data Flow Diagrams Solution will be very useful for those who consider making great looking, professional and smart diagrams, including the data flow ones. The Object Library contains a large number of shapes, including the design elements, such as different symbols and icons that can be used in the process of representing data flows and storage, processes and objects and other data flow entities.

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 from ConceptDraw STORE application for drawing your own context-level DFDs in ConceptDraw DIAGRAM diagramming and vector drawing software.


DFD Library System *

Pic 1. DFD Library System




Data Flow Diagrams Sample:


DFD Model of small traditional production enterprise
DFD Model
Data flow diagrams
Data Flow Diagram
DFD Process of account receivable
DFD Process
UML Class Diagram
UML Class Diagram




TEN RELATED HOW TO's:

Organigrams with ConceptDraw DIAGRAM  →

ConceptDraw - Organigram software allows quickly create Organigrams and much more. ConceptDraw DIAGRAM is an ideal tool for Administrative staff to clearly demonstrate the company orgchart professional.Organigrams with ConceptDraw DIAGRAM  *
Picture: Organigrams with ConceptDraw DIAGRAM
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Data Flow Diagram (DFD) →

In software engineering, it is important to understand how the system would cooperate with external sources, like data sources. To give this information a visual representation, data flow diagrams (DFD) were used for years. The entire system is usually divided into smaller ones, and all of them process data flows in appropriate ways. The visualizing business processes which engages the data transfer, is commonly preformed using DFDs (data flow diagrams). DFD is used to show the data flow processing and transformation. This DFD represents the electronic system of a customer purchase. It was created using Gane/Sarson notation. Data flow diagrams helps you to sort through and clarify transferring process making it available for analysis, and representation. ConceptDraw DFD solution introduces the vector library, containing the full set of icons from DFD notations.Data Flow Diagram (DFD) *
Picture: Data Flow Diagram (DFD)
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Account Flowchart Stockbridge System. Flowchart Examples →

Create your own flow charts of data processing systems using the ConceptDraw DIAGRAM diagramming and vector drawing software extended with the Cross-Functional Flowcharts solution from the Business Processes area of ConceptDraw Solution Park. This is a flowchart of a data processing system combining manual and computerized processing to handle accounts receivable, billing, and general ledger.Account Flowchart Stockbridge System. <br>Flowchart Examples *
Picture: Account Flowchart Stockbridge System. Flowchart Examples
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Basic Flowchart Symbols and Meaning →

While creating flowcharts and process flow diagrams, you should use special objects to define different statements, so anyone aware of flowcharts can get your scheme right. There is a short and an extended list of basic flowchart symbols and their meaning. Basic flowchart symbols include terminator objects, rectangles for describing steps of a process, diamonds representing appearing conditions and questions and parallelograms to show incoming data. This diagram gives a general review of the standard symbols that are used when creating flowcharts and process flow diagrams. The practice of using a set of standard flowchart symbols was admitted in order to make flowcharts and other process flow diagrams created by any person properly understandable by other people. The flowchart symbols depict different kinds of actions and phases in a process. The sequence of the actions, and the relationships between them are shown by special lines and arrows. There are a large number of flowchart symbols. Which of them can be used in the particular diagram depends on its type. For instance, some symbols used in data flow diagrams usually are not used in the process flowcharts. Business process system use exactly these flowchart symbols.Basic Flowchart Symbols and Meaning
Picture: Basic Flowchart Symbols and Meaning
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Example of DFD for Online Store (Data Flow Diagram) →

Structured-systems analysis and design method uses data flow diagrams to represent the process of data flowing through a system. Talking about this might be useless without a proper example of DFD for online store (Data Flow Diagram). This DFD example shows all the distinctness that a diagram can bring into a scattered data structure. Data flow diagrams are used to show how data is processed within some business processes. Making DFD is a common practice for business process modeling and analysis. This diagram represents the online store business flow. It describes inputs and outputs within online selling process and depicts the interactions between its participants. This DF diagram can be used by system analysts to create an overview of a business, to study and discover its inherent strengths and weak points.Example of DFD for Online Store
Picture: Example of DFD for Online Store (Data Flow Diagram)
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Data Flow Diagram Symbols. DFD Library →

Any information system receives data flows from external sources. In order to visualize them there is a list of data flow diagram symbols that describes how the system components cooperate. If you want to create a data flow diagram, ConceptDraw DIAGRAM Solution Park has DFD Library that contains both Yourdon and Gane-Sarson notations. This figure shows the content of vector libraries, delivered with ConceptDraw solution for data flow diagram (DFD). There are three libraries composed from about 50 vector objects used to make data flow diagrams. They include a complete set of objects utilized by Yourdon-Coad and Gane-Sarson notations - two primary notations that are apply for data flow diagramming. Also, one can discover additional "Data flow diagram (DFD)" library that provides a data flow diagram elements for designing level 1 and context-level data flow diagrams.Data Flow Diagram Symbols. DFD Library *
Picture: Data Flow Diagram Symbols. DFD Library
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Types of Flowchart - Overview →

A flowchart is a powerful tool for examining processes. It helps improving processes a lot, as it becomes much easier to communicate between involved people, to identify potential problems and to optimize workflow. There are flowcharts of different shapes, sizes and types of flowchart vary from quite basic process flowcharts to complex program flowcharts. Nevertheless, all these diagrams use the same set of special symbols like arrows to connect blocks, parallelogram to show data receiving or rectangles for showing process steps. Basic flowcharts are used to represent a simple process algorithm. A basic flowchart notation consists of rectangles (business processes), arrows (the flow of information, documents, etc.). The same notation is used in items such as the "decision", which allow you to do the branching. To indicate the start of the entire business process and its termination can be used the "Terminator" element. The advantages of Basic Flowchart are simplicity and clarity. With it you can quickly describe the business process steps. Creating of Basic Flowchart does not require any special knowledge, as easily understand by employees with different levels of education and IQ.Types of Flowchart - Overview *
Picture: Types of Flowchart - Overview
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Process Flowchart →

When trying to figure out the nature of the problems occurring within a project, there are many ways to develop such understanding. One of the most common ways to document processes for further improvement is to draw a process flowchart, which depicts the activities of the process arranged in sequential order — this is business process management. ConceptDraw DIAGRAM is business process mapping software with impressive range of productivity features for business process management and classic project management. This business process management software is helpful for many purposes from different payment processes, or manufacturing processes to chemical processes. Business process mapping flowcharts helps clarify the actual workflow of different people engaged in the same process. This samples were made with ConceptDraw DIAGRAM — business process mapping software for flowcharting and used as classic visio alternative because its briefly named "visio for mac" and for windows, this sort of software named the business process management tools. This flowchart diagram shows a process flow of project management. The diagram that is presented here depicts the project life cycle that is basic for the most of project management methods. Breaking a project into phases allows to track it in the proper manner. Through separation on phases, the total workflow of a project is divided into some foreseeable components, thus making it easier to follow the project status. A project life cycle commonly includes: initiation, definition, design, development and implementation phases. Distinguished method to show parallel and interdependent processes, as well as project life cycle relationships. A flowchart diagram is often used as visual guide to project. For instance, it used by marketing project management software for visualizing stages of marketing activities or as project management workflow tools. Created with ConceptDraw DIAGRAM — business process mapping software which is flowcharting visio alternative or shortly its visio for mac, this sort of software platform often named the business process management tools.Process Flowchart
Picture: Process Flowchart
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Design Elements for UML Diagrams →

The Rapid UML solution from Software Development area of ConceptDraw Solution Park includes 13 vector stencils libraries for drawing the UML 2.4 diagrams using ConceptDraw DIAGRAM diagramming and vector drawing software.Design Elements for UML Diagrams *
Picture: Design Elements for UML Diagrams
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