1. Globe Consulting

You are a senior systems analyst at Globe Consulting, a growing IT consulting firm. You are leading the development team for a major client. You need to explain data and process modeling to your two newly hired junior analysts (Michelle and Aidan) before meeting with the client tomorrow afternoon.

Tasks

1. Describe the rules for creating DFDs.
2. What are the data flow and process combinations that must be avoided when creating a DFD?
3. Explain what a diagram 0 is and how it is used.

2. Kitchen Gadgets

Kitchen Gadgets sells a line of high-quality kitchen utensils and gadgets. When customers place orders on the companys Web site or through electronic data interchange (EDI), 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.

Tasks

1. List four elements used in DFDs, draw the symbols, and explain how they are used.
2. Draw a context diagram for the order system.
3. Draw a diagram 0 DFD for the order system.
4. Explain the importance of leveling and balancing. Your boss, the IT director, wants you to explain FDDs, BPM, DFDs, and UML to a group of company managers and users who will serve on a systems development team for the new marketing system.

3. Big State University

The Big State University course catalog reads as follows: To enroll in MIS 260, which is an advanced course, a student must complete two prerequisites: MIS 120 and MIS 222. A student who completes either one of these prerequisites and obtains the instructors permission, however, will be allowed to take MIS 260.

Tasks

1. Create a decision table that describes Big State University course catalog regarding eligibility for MIS 260. Show all possible rules.
2. Draw a simplified decision tree to represent the Big State University catalog. Describe the results.
3. Why might you use a decision tree rather than a decision table?