4. Produce a context and data flow diagram.

This is the context and data flow diagram that I Produced. It is a simple form of a context and data flow diagram. It is not that detailed but it still portrays all the aspects I think is required in a markbook.

These are the definitions of both a context and data flow diagram. These have been retrieved from the ipt-tools. pdf located on student net.

Context diagrams are used to represent an overview of the entire information systems. The system is shown as a single process along with the inputs and outputs. The external entities are connected to the single process by data flow arrows. Each element represented is labelled.

Data flow diagrams represent an information system as a number of processes that together form the single system. This single system can be represented more simply using a context diagram (see below). Data flow diagrams therefore show a further level of detail not seen in the context diagram. Data flow diagrams identify the source of data, its flow between processes and its destination along with data generated by the system.

The diagram :
Click to maximise.