- Study the data flows and data stored in these diagrams and decide whether you agree with the teamâ€™s conclusion that the only six entity types needed are listed in the case and in. If you disagree, define additional entity types, explain why they are necessary, and modify accordingly.
- 7-49. Again, review the DFDs you developed for the Petrieâ€™s Electronics case (or those given to you by your instructor). Use these DFDs to identify the attributes of each of the six entities listed in this case plus any additional entities identified in your answer to Case Question 7-48. Write an unambiguous definition for each attribute. Then, redraw by placing the six (and additional) entities in this case on the diagram along with their associated attributes.
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