This book is organized to follow an iterative development strategy. OOA/D is applied to the NextGen POS system in multiple iterations; the first iteration is for some core functions. Later iterations expand the functionality of the system (see Figure 3.2). In conjunction with iterative development, the presentation of analysis and design topics, UML notation, and patterns are introduced iteratively and incrementally. In the first iteration, a core set of analysis and design topics and notation is presented. The second iteration expands into new ideas, UML notation, and patterns. And likewise in the third iteration.
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