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

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I am currently developing a use case diagram for an army generation system in a game I'm developing. I have a process 'GenerateArmy' that requires a combination of troops and a supply limit that are ...
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DO-178C, Software Considerations in Airborne Systems and Equipment Certification is the primary document by which the certification authorities such as FAA, EASA, and Transport Canada approve all ...
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I have an activity diagram below. I want to know if that kind of loop is correct. Is that "Waiting for the actor to stop listening to the music" a correct way to end the whole use case with that kind ...
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I am working on a project to detect cancer and I am using deep learning (Convolutional neural network). In the user interface, the user has only to input an image number then click test when the user ...
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I want to have a control flow decide whether an object can pass through a point in a flow or not. From my understanding of control and object flows, this would not work in the way I have done it, ...
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I am new to UML sequence diagrams. I saw a few YouTube videos and a few tutorials such as this one. I have a system with multiple inputs, that can interact with the system asynchronously. For example,...
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There are different methods for recognizing classes in UP methodology: noun/verb analysis using CRC analysis using RUP stereotypes other sources I have read above methods fully detailed in UML 2 and ...
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My question I built an inverted pendulum on an Arduino using C (ie. everything was done procedurally). I'm trying to self study application design and would like to refactor my code into a more OO ...
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I'm building my project with Visual Paradigm and I have some use cases that implements the CRUD pattern. As specified in the book Use Cases: Patterns and Blueprints, Övergaard and Palmkvist suggest ...
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This my first UML diagram for user registration flow. After double checking the diagram I feel that I have a crowded diagram compared to what I can found in Google search. My questions: Are my alt ...
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What are the design defects that can be spotted by using a class diagram, and how? I am not concerned about syntactical/ representational defects, but in things like the following: Do the classes/...
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I've learned the UML recently and I am trying to build a MonsterDuel system. However, there are a lot of classes in this project, and I am confused about the abstract class and its usage. Now, I have ...
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I would like to use UML diagrams to show some processes I am designing and would like to implement. The processes involve using a queue, and adding and taking out elements from it. In one of this ...
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I am currently in the process of creating a use case digram for a new system that we are building and have stumbled upon an interesting scenario. The system has a number of primary actors which ...
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There is a number of books written about OOAD (object-oriented analysis and design). A few of them can probably be considered good books, written by people with a lot of experience in the field. One ...
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I have this class diagram exercise in UML. The main problem was the permissions are the works, which I did not know very well how to model it. The specification says: Users can publish their work on ...
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There is a number of questions about the differences between UML Association, Aggregation and Composition out there and many many answers, some practical and some phylosofical. Here I'm asking we talk ...
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I have a process that I have been able to drawn somehow with a flowchart. This process involves several classes, loops and several threads of execution. However I am unsure which (if any) UML ...
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It seems that I need to have a MergeNode with incoming ControlFlow and ObjectFlow while according to paragraph 15.3.3.5 Merge Nodes of OMG® Unified Modeling Language® (OMG UML®) Version 2.5.1 If the ...
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My question is about an "edge case" of the UML class diagram. In particular, I have loads (about 30) classes that implement an interface. They can be split into two groups of similar classes. Within ...
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I was wondering about a use case scenario for a nested subsystem. Right now, I get on why and how to use subsystems, but when should a nested subsystem be used? In the picture below, I decided to ...
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I have just first heard of Unified Modelling Language, or UML (Note I am only an amateur software engineer), which wikipedia states is a "general-purpose modeling language in the field of ...
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Can requirements be expressed in class-diagrams? For example: A student can enroll in a class. There are different classes. Some classes have dependencies, e.g. you can't go to Spanish III before ...
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I am learning to create Use Case diagrams using the UML specification, but I have a couple of doubts about Use Case relationships which I cannot solve on my own. My question regards two different ...
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I am very new to UML and UML activity diagrams. my question is suppose in a student course registration system after student successfully login to the system there are 3 options add course, delete ...
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I am creating a system which makes static analysis on code when a commit to GitHub is made, the results are then showed as a GitHub review. My problem is, this means that the developer (actor) will ...
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I'm writing a Software Requirements Specification (SRS) document compliant with the standard IEEE-830-1998. I've also drawn a couple of UML diagrams, specifically a use case and an activity diagram. ...
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Searching for a good PHP real world example, I've found this example of "composite" using: FormElement as Component Fieldset and Form as Containers Input as Leaf (this is my UML from the code): So, ...
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What is the differences between the Class and Actor in UML. Can I use an actor in use case diagram which is used as a class in a class diagram?
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Let's say you have a wireless network that acts as a bridge/wireless repeater. How would both factor into a class diagram? In my mind it makes senses to have a parent object that can exist on its own. ...
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As it is said in ARLOW, J., AND NEUSTADT, I. UML 2 and the Unified Process, 2nd ed book, there are 7 types of relationship between different objects. Dependency Association Aggregation Composition ...
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In a SyML/UML activity diagram, how do you implement an OR gate ? There immediately came to mind to use a merge node. But does a merge node always have to come after a decision node? Also, I have ...
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For teaching purposes, I'm trying to replicate in a more faithful way from this conceptual UML (from wikipedia): In a "so-so" real world example, in my case, families of Loans and Insurances: So, can ...
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I am designing a system that contains organizational hierarchy management. There are four roles in the system which are the user, admin, manager and head of procurement: I am trying to let the ...
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After searching for some Abstract Factory examples using modern programming languages, I have some dillemas about the sensu lato of conceptual UML schema of Abstract, more specificly about the Client (...
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I try to design a client application for a messaging application. The client can send and receive messages, the client can connect/disconnect. My problem is that I don't know how to incorporate the ...
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I have the following use case about a video rental store which has the following actors: Member (Gold, Ordinal) Assistant Supplier Clerk The system is a desktop application for renting and reserving ...
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In UML 2.0, there are two ways of representing an association between classes which I can't seem to distinguish between. First of all, there is the qualified association, represented as such: You ...
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So i want to make a sequence diagram for login .. the first step is user access my website then the system redirect to login Form, then he insert username and password than the system validate it , if ...
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I recently found out that I have probably been using ball/socket notation in a wrong way all the time. Now I am confused by the different ways of drawing interface relationships in two regards (I ...
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I am trying to draw up a sequence diagram to show how my web client will interact with my backend over a websocket connection. I am using a websocket middleware to manage the stream connections. ...
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I am attempting to partition a decision node based on environment attributes. The process I am modeling is slightly different depending if a variable scope is public or private. I am trying to ...
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For modelling software implemented with the imperative or procedural programming paradigm we have Flowcharts, process diagrams, etc. For object oriented we have UML class diagrams, object diagrams, ...
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We know that the primary actor is the one that initiates a use case and a secondary actor is the one that helps completion of the use case through his specific support. The Primary actor is usually ...
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Consider the following Activity Diagram : First of all the activity a22 is confusing me through this configuration .If we need to list all the possible activity sequences that can take place in this ...
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I understand aggregation is a "whole/part" relationship, where the "parent" class is the whole and the "child" class is the part (and this is unidirectional), and that each class exist independently (...
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Consider the following state machine diagram: If we have the following event sequence : Close door --> Start --> Open door --> Reset and we need to know the corresponding response ...
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consider in a supermarket system , there is two actors : Customer and Clerk. To create the order , the customer interacts with the clerk and the clerk creates the order in the system. So my question ...
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In an UML 2.5 State Machine, how can I model sending a Signal as an effect on a transition in a convenient way? In one of the older UML versions you simply prefixed the name of the signal with a send ...
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As far I as I could tell, the proper way to show an object creation in a sequence diagram is with an asynchronous arrow, e.g., However, in Java (and other OO languages I have used), as far as I know, ...
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