You have built the first-cut data model for Piccadilly Television. This chapter gives you a sample answer and a discussion of how we derived our model. While we asked you for a first-cut model, we have cleaned up the model to an extent by eliminating entities and relationships that you may have included on your first pass.
The important task in this chapter is not for you to see if your model is a precise match to ours, but for you to be able to rationalize all the decisions that you made to build your model and to understand our reasoning. In some cases, we admit we have cheated. Since we have already analyzed this system, we possess background knowledge that you don’t have. ...
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