Sue Conger's "The New Software Engineering"
Read "Chapter 7: Process-Oriented Analysis" (pages 227-278).
Process-oriented analysis originated with the work of Yourdon/DeMarco and Gane/Sarson. The analysis follows a top-down approach to progressively more detailed levels of process analysis, resulting in context diagrams, data flow diagrams, and data dictionary entities. Take your time in reading and jot down any ideas or notes that stand out to you as particularly useful (or, conversely, confusing).
Click The New Software Engineering.pdf link to view the file.