Easiest: You have passed through Chapters 1.1Your Project Starts Here and 2.1Analysis Models in preparation for this chapter. The data flow diagram is a relatively simple model, and this chapter gives you enough information to use it in the Piccadilly Project. We have simplified some of the explanations in this chapter so that you’re not kept away from the Project any longer than necessary. However, we will return to data flow diagrams in Chapter 2.6More on Data Flow Diagrams to complete your knowledge of this model.
More Difficult: This chapter is not required reading for you, as we assume ...
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