The Unified Modeling Language is the industry standard for modeling software-intensive systems.

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31
votes
12answers
2k views

How often do you use Formal UML?

I used ad-hoc MUML (made-up modeling language) to design and explain system fairly frequently. It looks similar to UML and tends to be pretty well understood. However, I've had a professor or two ...
18
votes
3answers
20k views

UML Diagrams of Multi-Threaded Applications

For single-threaded applications I like to use class diagrams to get an overview of the architecture of that application. This type of diagram, however, hasn’t been very helpful when trying to ...
37
votes
11answers
6k views

Is code commonly generated from UML? [closed]

So when I was at university I was educated on the benefits of UML and its future in code development. But from my industry experience, I've found that while we do use diagrams—ranging from ER ...
9
votes
2answers
541 views

Why is it inappropriate to use UML diagrams to plan how your code will be organized?

So, yes, diagrams can be inappropriate at times. When are they inappropriate? When you create them without code to validate them, and then intend to follow them. There is nothing wrong with drawing ...
7
votes
3answers
533 views

Should I create Use Cases or create Class Diagrams first?

So I'm designing an Education Management System and I'm wondering if I should be creating the Use Cases or the Class Diagrams first?
5
votes
3answers
7k views

How do you annotate instantiation in UML class diagrams?

Given this pseudo code: class B { } class A : B { int val; }; alpha = new A(); What arrow do I draw between alpha and A in a UML class diagram? Is this even something UML is meant to do? +---...
1
vote
4answers
4k views

best way to handle a many to many relationship?

I am drawing a class diagram and I want to know what's the proper notation for many to many relationship between supplier and product? Should I show the table created supplier_product or leave it out ...
1
vote
1answer
54 views

Do UML classifiers with the same name combine, or is that not allowed?

If you have multiple instances of a classifier with the same name, do they simply combine, or is that not allowed? For example, are these two equivalent? +-----+ +-----+ +-----+ | Bar | | Bar |...
22
votes
4answers
44k views

UML class diagram notations: Differences between Association, Aggregation and Composition

I'm confused about some of the notations of UML class diagrams. Pretty sure I know what Association means. Any relationship between instances of two classes, where an instance of one class needs to ...
22
votes
20answers
13k views

How important are UML diagrams for a successful project? [closed]

I'm in the middle of a project and I was asked to write UML diagrams (use cases,class diagram,etc). The project isn't very complex. I was wondering if this be a waste of my time? Should I just be ...
13
votes
13answers
47k views

Best free UML authoring tool [closed]

What free UML authoring tools do you use and why is it better than others?
17
votes
3answers
1k views

Why is UML not used in most free software (e.g. on Linux)?

I'm trying to understand why UML is not used in most free software projects. For example, my Debian/Linux system has probably more than ten thousand free software packages, and I cannot name even one ...
11
votes
1answer
348 views

Drawing thread interaction

I'd like to draw (pen and pencils) threads interaction in a UML(-like) notation. I don't insist on UML, anything that is obvious to the reader should do. I started with sequence diagrams, but I don't ...
8
votes
7answers
594 views

How indepth should a programmer develop his understanding of the Unified Process and UML? [closed]

I know a lot of places use UML and the unified process as their development model... but then there's a lot that don't. Would it be important to have more than a basic and functional understanding of ...
3
votes
1answer
358 views

Model of simple traffic simulation [closed]

I want to write a simple traffic simulation with one road intersection. First I thought of a cellular automata in the model but it should not be limited by an underlying discrete grid system so the ...
-1
votes
4answers
497 views

Software for requirements and use cases [closed]

I am looking into some UML modeling software, which there is plentiful of on the market, but only a few I found support recording of requirements and written use cases (not the diagrams yet). Are ...
8
votes
5answers
1k views

What is the standard for modeling modern applications prior to development?

I'm taking on my first enterprise-level application and I want my team to model the entire ASP.NET MVC C# application before we even tap out one line of code. UPDATE: This was not intended to be a ...
3
votes
5answers
205 views

What is the correct OOP relation between complex and real numbers?

On one hand class complex { double real; double imaginary; } it is composition on the other hand class complex : double { double imaginary; } it is inheritance Which one is ...
3
votes
3answers
320 views

When presenting a software design to upper management

I'm presenting a software design for approval today and as I'm going through the hundreds of pages of design documentation, cherry picking what's important, I'm unsure if I should start with the ...
1
vote
1answer
2k views

UML Class diagram confusion

I am learning how to draw a UML class diagram and after reading a few tutorials, I am still confused about the appropriate usages of Association type (The clear diamond and black diamond). I ...
1
vote
2answers
233 views

How to capture “Display advertisement” use case?

What kind of use case it would be for to "show ad in part of the view"? Who could be the actor to relate with? User or System? As user has no specific goal to see ads, i am wondering what is the best ...
1
vote
2answers
211 views

Can a UML class diagram show two different relationships between two classes?

I have a class which has an inner (nested) class. I have shown this relationship between the two classes in my class diagram. However, I am also using the inner class within the outer class... do I ...
1
vote
1answer
48 views

In UML, can a component be placed inside a node?

in UML deployment diagrams, the node element is used to represent a "computational resource" (in other words, something that can run software). I know that nodes may have other nodes placed inside ...