Chapter 12, Problem 10RQ

Explanation of Solution

Data-flow diagram:

• A data-flow diagram (DFD) is a diagram used during both the analysis and design phases to document the processes of the current system or to provide a model of a proposed new system.
• Structure of DFD starts from a broad overview and expand it to a hierarchy of detailed diagrams

Uses:

• It shows not only the various processes within the system but also where the data needed for each process comes from, where the output of each process will be sent, and what data will be stored and where.
• The DFD does not provide any information about the process timing (e...