I have homework II

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Kitchen Gadgets

Kitchen Gadgets sells a line of high-quality kitchen utensils and gadgets. When customers place orders on
the company’s 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.

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 instructor’s permission, however, will be allowed to
take MIS 260.”

Tasks

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

Answer the following questions, based on the material in Chapter 5, Data and Process Modeling.

  1. Explain the differences between Gane and Sarson and Yourdon symbols. Provide examples (names,
    not the shapes) of symbols that represent processes, data flows, data stores, and entities.
  2. How would you explode DFDs?
  3. Describe a data dictionary and list the types of information it contains.
  4. What are some of the benefits and shortcomings of using CASE tools for process modeling activities?

every. thing I bout it her

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