1. Copyright © 2005 Hyundai Team 1 Intelligent Traffic Forecast System Hyundai Team 2005.09.13

2. Copyright © 2005 Hyundai Team 2 Contents  Introduction  Context Diagram layout  Find Actors  Find Use Cases  Adapting Use case Diagram  Describe How Actors & Use Cases Interact  Making Instance Scenario Of Use Cases  Possible Weakness In Capturing Requirement  Review: What Did Concern Us

3. Copyright © 2005 Hyundai Team 3 Introduction Intelligent Traffic Forecast System predicts the traffic flow and finds the best way. Roundabout way National highway Express Way Which way is the best on Chuseok holiday this year?

4. Copyright © 2005 Hyundai Team 4 Context Diagram layout ITFS (Intelligent Traffic Forecast System ) User Weather Information Provider Navigation System Traffic DB Request for Optimal path Display Optimal path Last 5 years traffic information various paths from departure to arrival Weather information Request for traffic Request for path

5. Copyright © 2005 Hyundai Team 5 Find Actors  User - A person who requests for the optimal path and gives a priority - A user is either PC user or mobile user by the access environment  Navigation System - a legacy system that provides the various paths  Traffic DB - an external database of the last 5 years traffic information.  Weather Information Provider - a legacy system that provides current weather information

6. Copyright © 2005 Hyundai Team 6 Find Use Cases  Validate Identification  Gather Weather Information  Set Priority  Request For Optimal Path  Analyze The Optimal Path  Inquire About The Various Paths  Calculate The Average Traffic  Create Log

7. Copyright © 2005 Hyundai Team 7 Adapting Use case Diagram

8. Copyright © 2005 Hyundai Team 8 Describe How Actors & Use Cases Interact Use Case nameRequest for optimal path Unique use Case IDUC-105 Primary actor(s)User Brief descriptionUser submits the request for the optimal path in time. If there is, weather and priority setting information also can be input data. After the use case gets all of the request information, it invokes the included use case, ‘Analyze the optimal path’ and ‘create log’. After it gets the optimal path, the system displays the result of calculation to the user screen. PreconditionsSuccess in the security check Flow of events1.User completes the online request for the optimal path by inputting the locations of departure and arrival. 2.Preparation for calculating the optimal path. …….

9. Copyright © 2005 Hyundai Team 9 Making Instance Scenario Of Use Cases Happy Case: System can find the similar condition in the past traffic database. But... Unhappy Case: System can’t find the similar condition.. Needs to find the most similar case.

10. Copyright © 2005 Hyundai Team 10 Possible Weakness In Capturing Requirement  Security Problem  If we don’t identify the “validate identification” use case, we can’t find this problem.  System capacity  Response time per user at peak  How many users the system can support?  How much data the database can handle?

11. Copyright © 2005 Hyundai Team 11 Review: What did concern us  What is the most important thing when we define the scope of use cases? Easy to read and understand. Clear to trace and find the defects. Do not overlap or omit the functions of use cases.  Which is the more efficient way merging use cases or dividing them into included use cases? To have more readability, we divide the use cases into included use cases. To adjust the granularity of use cases, we can merge or divide the use cases.

12. Copyright © 2005 Hyundai Team 12 Q & A