Complete Systems Analysis: The Workbook, the Textbook, the Answers

3.7. Review: Identifying Events

Before You Reached Here ...

You have identified and listed all the events for the Piccadilly system. This exercise was given in Chapter 1.8 Identifying Events.

The Context Is Your Guide

The problem statement in Chapter 1.8 suggested that the Piccadilly context diagram from the current physical model (Figure 3.6.1) is the primary input to building the event list. Figure 3.7.1 repeats that diagram except that each boundary data flow is connected to an event by its number in the event list in Figure 3.7.2.

Piccadilly Event List

By going through the remainder of the context diagram and referring to the background material on Piccadilly as well as the lower-level diagrams, we came up with the event list in Figure ...