UML and Use Cases


My background is application design, but I have never used UML and or Use Cases.

Is UML and use cases the same thing?

Are they somehow valuable to the design of the application?

Briefly, what is the value of UML / and or Use Cases ?

What is your opinion about them (weather or not using Use Cases / and or UML has alot of value or not)...   What is the advantage of designing an application with UML / and or Use Cases, as opposed to just simply going straight to the drawing board and writing hand-written specs., pictures, drawings, and screen mock-ups.







kamleshmistryAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

RanjeetRainCommented:
This is a very broad question. And requires good deal of discussion. What basically you want to know is -- What is UML and how to use it and why. As I said, this is a huge subject. I will try to explain in brief.

--------------------------------------------------------------------------------------------------------------------
The Unified Modeling Languageā„¢ - UML - is the way the world models application structure/behavior/architecture, business process, and data structure.  

UML, along with the Meta Object Facility provides a key foundation for OMG's Model-Driven ArchitectureĀ®, which unifies every step of development and integration from business modeling, through architectural and application modeling.
--------------------------------------------------------------------------------------------------------------------

Above text is simplified version of what the masters themeselves say about UML. In layman's terms, UML is a modelling tool to aid software architects and application developers in all phases of SDLC.


A use case is one of the many tools described in teh UML specification. Let us see what the masters say about the Use Cases.


--------------------------------------------------------------------------------------------------------------------
A use case is a behaviored classifier that defines a sequence of actions, performed by one or more actors and the system, that results in an observable result of value to one or more actors.

A use case always has one main flow of events (also known as a basic course of action, and will generally have at least one exceptional flow of events (or alternate course of action).
--------------------------------------------------------------------------------------------------------------------

In simpler words, a use case defines a sequence of actions, performed by one or more actors and the system that results in an observable result of value to one or more actors. A use case has a flow of events (and will generally have at least one exceptional flow of events.

In even simpler words, a use case is a sequence of actions that are tobe performed by human users of a system or the system itself. Such sequence of actions generally have only one flow of events. But they may have an exceptional flow of events as well (exception handling).



0
RanjeetRainCommented:
0
kamleshmistryAuthor Commented:
Thanks for all that info.

Can you say why I should use it?  Why do I need to learn it?  Why can't I just go about it the natural way...
I.e.  Verbal and written specs. , flow charts, and screen mock ups?

What do these tools do that can't be done with my current strategy?
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Programming

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.