Software Design: Transaction Analysis

Transaction Analysis

An alternative structured design strategy for developing structure charts is called transaction analysis.

Transaction analysis is the examination of the DFD to identify processes that represent transaction centers.

A transaction center is a process that does not do actual transformation upon the incoming data (data flow); rather, it serves to route the data to two or more processes.

You can think of a transaction center as a traffic cop that directs traffic flow.

Such processes are usually easy to recognize on a DFD, because they usually appear as a process containing a single incoming data flow to two or more other processes.