Data Flow Diagram (DFD) is a methodology of graphical structural analysis and information systems design, which describes the sources external in respect to the system, recipients of data, logical functions, data flows and data stores that are accessed. DFDs allow to identify relationships between various system's components and are effectively used in business analysis and information systems analysis. They are useful for system’s high-level details modeling, to show how the input data are transformed to output results via the sequence of functional transformations. For description of DFD diagrams are uses two notations — Yourdon and Gane-Sarson, which differ in syntax.
Online Store DFD example illustrates the Data Flow Diagram for online store, the interactions between Customers, Visitors, Sellers, depicts User databases and the flows of Website Information. ConceptDraw DIAGRAM enhanced with Data Flow Diagrams solution lets you to draw clear and simple example of DFD for Online Store using special libraries of predesigned DFD symbols.
Pyramid diagrams help you visualize information as a triangle divided into horizontal slices. Labelled slices represent a hierarchy. Pyramids are used in marketing presentations to show and analyze hierarchy levels.
3D triangular diagram of DIKW pyramid has 6 levels: measurement, facts, data, information, knowledge, wisdom.
The data component include different scattered signs or symbols which are merely useless until these random objective facts are somehow processed. Data is a resource which has to be manipulated or rearranged to get useful. Information can be extracted from a pile of data, it also can be mined from different data storages.
