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"Data flow diagrams are one of the three essential perspectives of the structured-systems analysis and design method SSADM. The sponsor of a project and the end users will need to be briefed and consulted throughout all stages of a system's evolution. With a data flow diagram, users are able to visualize how the system will operate, what the system will accomplish, and how the system will be implemented. The old system's dataflow diagrams can be drawn up and compared with the new system's data flow diagrams to draw comparisons to implement a more efficient system. Data flow diagrams can be used to provide the end user with a physical idea of where the data they input ultimately has an effect upon the structure of the whole system from order to dispatch to report. How any system is developed can be determined through a data flow diagram model.
In the course of developing a set of levelled data flow diagrams the analyst/ designers is forced to address how the system may be decomposed into component sub-systems, and to identify the transaction data in the data model.
Data flow diagrams can be used in both Analysis and Design phase of the SDLC.
There are different notations to draw data flow diagrams (Yourdon & Coad and Gane & Sarson), defining different visual representations for processes, data stores, data flow, and external entities." [Data flow diagram. Wikipedia]
The DFD (Yourdon and Coad notation) example "Process of account receivable" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Data Flow Diagrams solution from the Software Development area of ConceptDraw Solution Park.
Data Flow Diagram
Data Flow Diagram, process, external interactor, data store,
Used Solutions

data flow diagram, DFD templates Data Flow Diagrams (DFD)

data flow diagram, DFD templates
Data Flow Diagrams solution extends ConceptDraw DIAGRAM software with templates, samples and libraries of vector stencils for drawing the data flow diagrams (DFD).

Applications

ConceptDraw DIAGRAM is a multipurpose software from ConceptDraw suite intended for diagramming, business and technical drawing, and visual documenting. You can reach a lot of practical benefits from the use of ConceptDraw DIAGRAM. The list of ConceptDraw DIAGRAM applications and versatile possibilities is extremely great. Among them network and system diagramming, business diagramming, Cisco network design, network visualization, software and database design, software development, business flowcharting, data flow design, databases modeling and visualization, business processes modeling, business drawing, technical drawing, GUI prototyping, Organizational charts construction, business processes fixing, web site planning and design, Internet solutions design, information architecture design, UML modeling, ER diagrams design, home and landscape design, and a lot of other applications. ConceptDraw DIAGRAM offers the users a beneficial collaboration, compatibility with MS Visio and many other popular programs, including other products from ConceptDraw suite.

event-driven process chain diagram, EPC diagram, process chain flowchart Event-driven Process Chain Diagrams

event-driven process chain diagram, EPC diagram, process chain flowchart
Event-Driven Process Chain Diagrams solution extends ConceptDraw DIAGRAM functionality with event driven process chain templates, samples of EPC engineering and modeling the business processes, and a vector shape library for drawing the EPC diagrams and EPC flowcharts of any complexity. It is one of EPC IT solutions that assist the marketing experts, business specialists, engineers, educators and researchers in resources planning and improving the business processes using the EPC flowchart or EPC diagram. Use the EPC solutions tools to construct the chain of events and functions, to illustrate the structure of a business process control flow, to describe people and tasks for execution the business processes, to identify the inefficient businesses processes and measures required to make them efficient.