Question

Use Case Diagram Suggestion

Asked by: shieldguy

Please advice me on the given use case diagram that which mistakes I had made in it
I am also adding the functional flow chart to understand what we actually trying to achieve in this system

Thanks

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Asked On
2008-04-15 at 03:00:22ID23323124
Tags

UML Use Case Diagram

Topics

Project Management

,

.NET

,

Documentation in Programming

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Answers

 

by: TheLearnedOnePosted on 2008-04-15 at 06:11:30ID: 21358293

1) The layout is confusing with lines crossing.  I try to avoid crossing lines, if I can.

2) What are the use cases with the separator lines doing?  You should only have a single use case in an ellipse.

Bob

 

by: shieldguyPosted on 2008-04-15 at 06:17:27ID: 21358343

1)  I will try to fix the line crossing issue.
2)  Use case with seperate line are Actually i got it from one tutorial, its called Extend.

Extends:
In some instances you want to describe a variation on behaviour in a more controlled form.  In such instances you can define extension points in the extended use case.  In the example below, search by name is said to extend search at the name extension point.  The extends link is more controlled than the generalization link in that functionality can only be added at the extension points

http://www.visualcase.com/tutorials/use-case-diagram.htm

Thanks

 

by: TheLearnedOnePosted on 2008-04-15 at 06:19:13ID: 21358361

I understand the Extends usage, but that doesn't describe having two entries in a single use case with a line separating them.  It describes have separate use cases with <extends>, which you have included in the diagram.

Bob

 

by: shieldguyPosted on 2008-04-15 at 06:26:53ID: 21358433

So bob you saying that all I need to do is to remove the extra use case text from the use case with line seperator?

 

by: shieldguyPosted on 2008-04-15 at 06:30:11ID: 21358474

Actually the functional flow chart given in my diagram is designed by my senior and i had designed the use case based on those information can you please highlight me any mistakes you see in my use cases?

Thanks

 

by: TheLearnedOnePosted on 2008-04-15 at 06:37:48ID: 21358535

Use cases, in my mind, are points in your process that are user interactions (usage).

Examples:

1) Printing
2) Searching
3) Selecting
4) Editing
...

Extends describe a variation of that interaction.

This example shows enrolling in a university, and security checks are required for international students.  The use case is enrolling, and perform security checks extends that usage for international students.

Reuse in Use-Case Models: <<extend>>, <<include>>, and Inheritance
http://www.agilemodeling.com/essays/useCaseReuse.htm

Bob

 

by: shieldguyPosted on 2008-04-16 at 03:00:13ID: 21366114

so i guess in my diagram i just didnt put the extend correctly

actually I am a bit confused about extend and include

what i have understand is that
extend is when u need the current use case to perform some task in between the time of execution and that task becomes a extend use case

include use case i m not sure what is it

can you explain please
thanks

 

by: TheLearnedOnePosted on 2008-04-16 at 10:04:22ID: 21369874

I tried to explain what extends means in the previous comment.  Are you saying that you don't understand the explanation?

Bob

 

by: shieldguyPosted on 2008-04-16 at 10:05:45ID: 21369885

yes

 

by: TheLearnedOnePosted on 2008-04-16 at 10:10:48ID: 21369927

Did you look at the example on the web page that I referenced?

Bob

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