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Write Extended Use Case - Exercise

Use Case Description, part 2

Course project: Write an extended use case description. Objective:Write an extended use case description for one of the course project use cases.

Exercise scoring

This exercise is worth a total of 25 points.

Background and Overview

This is the seventh exercise in the course project.

Download files

No downloadable files are required to complete this exercise.


Review the problem statement below, then write an extended use case narrative for the use case Select Seats.
  1. Identify the triggering event for the use case (Initiation).
  2. Specify any needed behaviors that must be handled by another use case prior to allowing anyone to access this use case (assumptions).
  3. Identify any pre-conditions that are placed on this use case.
  4. Describe the dialog between the actor and the use case without any errors or exceptions (main flow of events).
  5. Describe a dialog that includes one of the possible exceptions (exceptional flow of events).
  6. Continue to add exception flows until all exceptions have been documented.
  7. Identify the items that the use case must handle before terminating (post-conditions).


Use the template items listed here:
  1. Use Case Name
  2. Assumptions
  3. Pre-conditions
  4. Initiation (triggering event)
  5. Main flow of events
  6. Exceptional flows of events (Note: There may be no exceptions, or there may be many.)
  7. Post-conditions

Problem statement

Our auditorium is used for different types of events. Some of the events are one-time events, such as basketball games. Other events consist of a number of shows, such as plays or concerts.
The event planner can change the floor plan for each event. Some events use the floor for seating (like concerts) and others do not (like basketball games). All the show seating charts for the same event should be based on the same floor plan.
The event planner schedules events and shows. Once an event is negotiated, the event planner decides on the floor plan and schedules the individual shows for the event. Once the shows are scheduled, the event planner prices the shows. Pricing is done using a pricing plan. A pricing plan consists of a set of price tiers. Each price tier contains prices for one or more price types:
  1. adult,
  2. senior,
  3. student, and
  4. child.
The event planner assigns each price tier to a group of seats in a show, one tier per seat. The event planner may also add one or more discounts to the show to try to improve sales.
Customers can purchase seats online. Once they provide us with their mailing address, they can look up shows and select the seats they want to reserve. Customers may pay only by credit card payments. If they want refunds, we will credit the card used to purchase the ticket.

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