I’m working on a information technology question and need guidance to help me learn.
A data flow diagram (DFD) shows how information flows within an information system. A DFD is a representation of the data flow and does not imply the activity order. A DFD is a model of a real-world business system represented through a hierarchy of abstracts through leveling. Lower levels of a DFD reflect more detail, and higher levels of a DFD reflect less detail. A logical system diagram describes the business events that take place and the data required for each business event, focusing on what information is flowing and what information is transmitted. A DFD will not go into technical (hardware and software) aspects of the system; it will show inputs and outputs from external sources, showing the path of data and how it flows through the system.
Prompt
For this activity, you need to create a data flow diagram reflective of the following:
- Your experience registering for a course and then following the process through payment (or using financial aid).
- Access course catalog
- Review course options
- Select course to register for
- Complete registration
- Pay for course
Your DFD must include the listed processes and at least two subprocesses (levels) within two of the five main processes. Your diagram can reflect up to three levels: zero (the context diagram), one (subprocess), and two (functionality). The various levels of detail are:
- Level zero: Represents the overview of the entire system you are critiquing
- Level one: Breaks down the main functions of the system into smaller subprocesses
- Level two: Further breaks down subprocesses of level one
Use the symbols from the Gane and Sarson symbol set needed to illustrate data flow within your diagram:
- External entity = Square ?
- Data flow = Arrow ?
- Process = Rounded square ?
- Data stored = Rectangle ?
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