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

Copyright © 2005 Hyundai Team 1

Intelligent Traffic Forecast System

Hyundai Team

2005.09.13


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


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?


Context Diagram layout

ITFS(Intelligent Traffic Forecast System )

User

Weather Informati

on 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


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


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


Adapting Use case Diagram

Intelligent Traffic Forecast System

Gather weather informationWeather Service Provider

Create log

Analyze the optimal path

Navigation System

Inquire about the various paths

<<include>>

Traffic DBCalculate the average traffic

<<include>>Set priority

Request for optimal path

<<extend>>

<<extend>>

<<include>>

<<include>>

Validate identification

User

Validate identificationfor Mobile user

Mobile user

Validate identificationfor PC user

PC user


Describe How Actors & Use Cases Interact

Use Case name Request for optimal path

Unique use Case ID UC-105

Primary actor(s) User

Brief description User 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.

Preconditions Success in the security check

Flow of events 1. User completes the online request for the optimal path by inputting the locations of departure and arrival.

2. Preparation for calculating the optimal path. ……. …….


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.


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?


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 .


Q & A

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

Documents

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