Techniques and tools for Systems Development.

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Mapa Mental sobre Techniques and tools for Systems Development., creado por Rrshai Bekoe el 06/02/2018.
Rrshai Bekoe
Mapa Mental por Rrshai Bekoe, actualizado hace más de 1 año
Rrshai Bekoe
Creado por Rrshai Bekoe hace más de 6 años
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Resumen del Recurso

Techniques and tools for Systems Development.
  1. Entity Relationship Diagrams
    1. Shows all the entities important to a system and their relationships.
    2. Entity Relationship Models
      1. A means of showing the relationships of entities.
      2. Data Flow Diagrams
        1. Describes the flow of data between entities in a system. Processes explain what must happen and arrows show the destination of the data.
          1. Entity - represented by an oval shape. The entity is anything that is distinct and unique in its existence. For example, a person.
            1. Process - represented by a square box with 3 areas. Top left are is the unique process ID. The top right shows who's responsible
              1. Data Type is specified in detail the higher the level of this diagram.
              2. Information Flow Diagrams
                1. Used to show the flow of information in a diagram linking entities and external/internal parts of an organisation.
                    1. Courtesy of uml-diagrams.org
                  1. Data Dictionary
                    1. A centralised store of information.
                      1. Can include data elements, meanings, format, data types & entity names
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