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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:

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
Related Solution:

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
Related Solution:

Sales Process Flowchart Symbols →

The most easier way of creating the visually engaging and informative Sales Process Flowchart is to create the new ConceptDraw document and to use the predesigned vector symbols offered in 6 libraries of the Sales Flowchart Solution. There are more than six types of sales process flow diagrams, ConceptDraw DIAGRAM software is flowchart maker which include six collections of extended flowchart symbols for effective diagramming. There are main collections of color coded flowchart symbols: Sales Department, Sales Steps, Sales Workflow, Sales Symbols and special set of Sales Arrows and Sales Flowchart.Sales Process Flowchart Symbols *
Picture: Sales Process Flowchart Symbols
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How to Create a Social Media DFD Flowchart →

In order to be successful, you have to promote your business on the market. One of the ways for planning this promotion is to create a social media DFD Flowchart which will contain all the details of your business strategy. Social media is a very influential tool, and it's a mistake to ignore it. The following flowchart represents a best way to estimate social media posts, and gives a strategy of responses. This flowchart is designed in the format of cross-functional flowchart. With this format, we can divide the process into three distinct phases. This approach helps to generate well-considered and balanced response on social networks activities. Using ConceptDraw solution for Social Media Response, your reaction to social media posts will positively mirror the values and mission of your business.How to Create a Social Media DFD Flowchart *
Picture: How to Create a Social Media DFD Flowchart
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UML Package Diagram. Design Elements →

UML Package Diagram illustrates the functionality of a software system. ConceptDraw has 393 vector stencils in the 13 libraries that helps you to start using software for designing your own UML Diagrams. You can use the appropriate stencils of UML notation from UML Package library.UML Package Diagram. Design Elements *
Picture: UML Package Diagram. Design Elements
Related Solution:

How to Connect Social Media DFD Flowchart with Action Maps →

The Social Media Response solution creates interactive social media flow charts and action mind maps. The solution includes a video tutorial and a number of samples helping social media teams refine and organize their response process.How to Connect Social Media DFD Flowchart with Action Maps *
Picture: How to Connect Social Media DFD Flowchart with Action Maps
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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
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Types of Flowcharts →

A flowchart is a simple but very functional tool when it comes to understanding a workflow or to removing unnecessary stages from a process. When drawing flowcharts, keep in mind that there are four common types of flowcharts, like document flowcharts and data flowcharts that show control over a data or document flow over a system. To show controls on a physical level, use system flowcharts. In addition, to show controls in a program, you can draw a program flowchart. This flowchart diagram represents the piece of an article editing process, that involves the author and editor. It was created using the Basic Flowchart notation that consists from the basic flowchart symbols. The start and the end of the process are indicated with "Terminator" symbols. The "Process" symbols show the action steps consisting from making edits and searching for a compromise, when the author does not agree with the suggestions of the editor. The "Process" symbol is the general symbol in process flowcharts. The "Decision" symbol indicates a branching in the process flow. There are two branches indicated by a Decision shape in the current flowchart (Yes/No, Disagree/Agree). This basic flowchart can be used as a repeating unit in the workflow diagram describing the working process of some editorial office.Types of Flowcharts *
Picture: Types of Flowcharts
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