data flow diagram


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data flow diagram

[′dad·ə ¦flō ‚dī·ə‚gram]
(computer science)
A chart that traces the movement of data in a computer system and shows how the data is to be processed, using circles to represent data. Also known as bubble chart; system flowchart.

Data Flow Diagram

(programming)
A graphical notation used to describe how data flows between processes in a system. Data flow diagrams are an important tool of most structured analysis techniques.

http://smartdraw.com/resources/centers/software/dfd.htm.

data flow diagram

A description of data and the manual and machine processing performed on the data as it moves and changes from one stage to the next. It also includes the locations where the data are placed in permanent storage (disk, tape, etc.).
References in periodicals archive ?
In addition, Data Flow Diagram will be used to demonstrate the design of self-asking questions.
Reviews of specifications and overview designs should examine data flow diagrams and data models for consistency, proper balancing between levels, and accuracy and completeness of the data dictionary.
Cross-references (explosion paths) between all Processes, Sub-processes, Files and Data Flows depicted in the Data Flow Diagrams.
While the concept of a table is an easy one, the question remains how one creates the table to communicate the same information and relationships as the data flow diagram.
It includes an object diagram, data flow diagrams and state-transition diagrams.
The process modeling aspect of the case involves the creation of data flow diagrams to model the entire electronic voting system as described.
Whether the faculty member teaches a structured approach using data flow diagrams or an object-oriented approach using Unified Modeling Language (UML), process modeling is an important part of the skills taught in an SAD course (Guidry, et al, 2011).
Further, the individual data flow diagrams that make up the data flow diagram set should also conform to the rules for modeling data flows and the processes that transform them.
This provides a graphical interpretation and analysis tool which adopts a different approach to that embodied in the data flow diagram in which such iteration and selection structures are forbidden.
The top-ranked stimulus, Data Flow Diagram, comes as no surprise, as the manual use of this tool to draw and revise requirements has been viewed as extremely time consuming [27].
These are teaching students to draw entity relationship diagram, teaching students to balance a data flow diagram, requiring students to learn data collection, teaching data modeling concepts, requiring students to complete a project requiring project management skills, teaching students to draw a complete data flow diagram, teaching students to complete a project that requires the use of both data and process modeling skills, and requiring students to complete a project as a team.
In our method we retain the data flow diagram representation of inputs and outputs.