Two fundamental models fall into the Linear class, the Standard Waterfall and the Rapid Development Waterfall. Both are introduced here. In addition to the models themselves, I have included a graphic of the Linear SDPM strategy as applied to each. The details of those strategies are discussed in Chapters 4 through 9.
The first thing to note about this version is that each phase must be complete before the next phase can begin, and that once a phase is complete there is no returning at some later point to revise work completed earlier. That might be acceptable until a change is introduced at which time potential scheduling disaster might result.
Figure 3-3 illustrates the Linear SDPM strategy for the Standard Waterfall model.
A variation of the Standard Waterfall model somewhat alleviates the non-overlap situation of the Standard Waterfall Model. It is shown in Figure 3-4.
Note the overlap between successive phases. That brief period ...