What is Qualitative Data?
Descriptive data, often composed of text.
What is Quantitative Data?
Measured data, often in the form of numbers, percentages or statistics
What is a level 0 Data Flow Diagram
Level 0 data flow diagrams show the transfer of data in a simple manner.
Commonly Generalised and not shown separately for a more basic overview.
What is a Level 1 Data Flow Diagram?
Level 1 data flow diagrams show the transfer of data in a more detailed manner. Processes are shown separately, for a more complex and realistic overview.
Impacts that Affect the Flow of Information?
Reasons include: Information not being filled incorrectly. Computer system failure. Human Error. Breakdowns in human communication.
What does the arrow represent in a DFD?
Data Flow
What does the rectangle with soft edges represent in a DFD?
Process
What does the rectangle with sharp edges represent in a DFD?
External Entity.
What does the Rectangle with sharps edges and a small box cut into the shape represent in a DFD?
Data store