Systems Analysis Activities
The systems analysis phase includes the four
main activities shown in Figure 4-2: requirements modeling, data and process modeling,
object modeling, and consideration of development strategies.
Although the waterfall model shows
sequential SDLC phases, it is not uncommon
for several phases (or certain tasks within a
phase) to interact during the development process, just as they would in an adaptive model.
For example, this occurs whenever new facts
are learned or system requirements change
during the modeling process. Figure 4-2 shows
typical interaction among the three modeling
tasks: requirements modeling, data and process
modeling, and object modeling.