Coursework: Travel Agent

1
Coursework Travel Agent

• Software Engineering
• M.Sc Computing Science
• Department of Computer Science
• and Information Systems
• Birkbeck College, University of London
• Thursday, 10 November 2005
• Deadline 10 January 2006
• Penalty for delay Grade Grade 5
  DaysOfDelay

2
Travel Agent System

• General assumption The system is already
  started up and a human or computerized travel
  agent is ready to provide booking services to a
  customer.
• Task 1 Write a fully-dressed use case named
  Book flight.
• Hints This starts from the point that a
  customer defines his/her preferences for the trip
  (dates, departing and final destination
  locations, the maximum number of stopovers and
  food preferences). The system must check for
  flight availability and come up with a number of
  alternative travel plans. The customer selects
  the most convenient plan from the ones offered.
• Task 2 Design a System Sequence Diagram (SSD)
  for the use case derived in Task 1.
• Task 3 Design a Domain Model that includes the
  conceptual objects derived from the use case in
  Task 1.

3
Travel Agent System (cont.)

• Task 4 Select 2 external system operations from
  the SSD (in Task 2) and write corresponding
  Contracts.
• Task 5 Design interaction diagrams, one for each
  external operation (from the SSD in Task 2).
  Include annotations of design patterns applied.
  Use either collaboration or sequence diagrams.
• Task 6 Design a DCD (design class diagram) that
  includes the classes of all software objects
  included in the interaction diagrams of Task 5.
• Task 7 Write class definitions (attributes and
  method signatures) and method definitions based
  on the interaction and design class diagrams
  (Tasks 5 and 6). Code in Java.
• Hint It is not required to create fully-working
  code. In the method bodies you should only
  include statements that denote the order in which
  messages are sent (methods are invoked) in the
  interaction diagrams.

4
Remarks

• Comments that will strengthen your work
• Try to justify and comment on analysis and design
  decisions. Discuss informally what led you to
  analyze and design part of the system in a
  specific manner.
• Describe briefly the methodology used to perform
  a task, based on the output of previous tasks.
  For instance, mention a few points about how one
  can derive different parts of the Implementation
  Model based on Interaction Diagrams or DCDs.
• Approach this work in an iterative manner, and
  record your experience on identifying changes and
  adapting requirements, analysis and design
  through iterations.
• Identify realistic requirements (and perform
  realistic analysis and design) by acquiring
  experience from trying to use an online booking
  system.
• Use Borland Together, or another similar tool
  that you are familiar with.

5
Issues to reflect on

• Remember, there is no perfect solution!
• Which important elements of the architecture are
  still needed in order to create a fully-fledged
  system?