SOLUTION: Northern Virginia Community College Functional Decomposition Diagram Paper

Homework Assignment 1
Please read the following three scenarios and draw the functional decomposition diagram, up to
two levels below the root for each scenario.
Instructions: Submit your solutions in Word or PDF only. Other formats will not be graded. Use Lucid
chart or diagramming software to create diagrams. Hand-written assignments will not be accepted.
1. Create a functional decomposition diagram for an online university registration system. The system
should enable the staff of each academic department to examine the courses offered by their
department, add and remove courses, and change the information about them (e.g., the maximum
number of students permitted). It should permit students to examine currently available courses, add
and drop courses to and from their schedules, and examine the courses for which they are enrolled.
Department staff should be able to print a variety of reports about the courses and the students
enrolled in them. The system should ensure that no student takes too many courses and that students
who have any unpaid fees are not permitted to register. (Assume that a fees data store is maintained by
the university’s financial office, which the registration system accesses but does not change)
2. Create a functional decomposition diagram for the following system: A Real Estate, Inc. (AREI), sells
houses. People who want to sell their houses sign a contract with AREI and provide information on their
house. This information is kept in a database by AREI, and a subset of this information is sent to the
citywide multiple listing service used by all real estate agents. AREI works with two types of potential
buyers. Some buyers have an interest in one specific house. In this case, AREI prints information from
its database, which the real estate agent uses to help show the house to the buyer (a process beyond
the scope of the system to the modeled). Other buyers seek AREI’s advice in finding a house that meets
their needs. In this case, the buyer completes a buyer information form that is entered into a buyer
database, and AREI real estate agents use its information to search AREI’s database and the multiple
listing service for houses that meet their needs. The results of these searches are printed and used to
help the real estate agent show houses to the buyer.
3. Create a functional decomposition diagram for the following system: a Video Store (AVS) runs a series
of fairly standard video stores. Before a video can be put on the shelf, it must be catalogued and entered
into the video database. Every customer must have valid AVS customer card in order to rent a video.
Customer rent videos for 3 days at a time. Every time a customer rents a video, the system must ensure
that this customer does not have any overdue videos. If so, the overdue videos must be returned and an
overdue fee paid before the customer can rent move videos. Likewise, if the customer has returned
overdue videos, but has not paid the overdue fee, the fee must be paid before new videos can be
rented. Every morning, the store manager prints a report that lists overdue videos; if a video is two or
more days overdue, the manager calls the customer to remind him or her to return the video. If a video
is returned in damaged condition, the manager removes it from the video database and may sometimes
charge the customer.

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