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Data Flow Diagramming Solutions to In-Class Exercises

Precision Tools and Evergreen Nurseries case studies analyzed for system architecture and operations. Context and Level-0 diagrams created to depict order processing workflows.

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Data Flow Diagramming Solutions to In-Class Exercises

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  1. Data Flow DiagrammingSolutions toIn-Class Exercises

  2. In-Class Exercise: Precision Tools Precision Tools sells a line of high-quality woodworking tools. When customers place orders on the company’s Web site, the system checks to see if the items are in stock, issues a status message to the customer, and generates a shipping order to the warehouse, which fills the order. When the order is shipped, the customer is billed. The system also produces various reports. 1. Draw a Context Diagram for the order system. 2. Draw a Level-0 DFD for the order system.

  3. Precision Tools Context Diagram

  4. Precision Tools Level-0 Diagram

  5. In-Class Exercise: Evergreen Nurseries • Sells plants and gardening supplies wholesale • Sales representative takes customer order via phone • verifies customer’s credit • determines if items are in stock • notifies customer of product(s) availability • informs customer of special discounts and total cost • Order is processed • customer account updated • product inventory adjusted • ordered items pulled from stock and packed • order shipped to customer with packing slip • Billing • monthly billing statement sent to customer • customer has 30 days to remit payment • Monthly reports produced for manager

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