Easiest: You have come here from Chapter 1.3What About the Business Data? In this chapter, we leave the data model temporarily to return to the data flow diagram. Previously, in Chapter 2.2Data Flow Diagrams, we have considered the data flow diagram as a model of the system’s function. This chapter provides additional information that you’ll need in the Piccadilly Project and in your regular systems analysis work.
More Difficult: You are presumed to know this material, but it won’t ...
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