Systems Analysis & Design

Software

Software required for this course: Visual Paradigm (Community Edition) You must register but it is a free trial version

Link to Visual Pardigm community edition (free): http://www.visual-paradigm.com/download/community.jsp

Xtra-vision express URL (Importante: revisar esto para la próxima clase)

Click https://xtra-vision.ie/how-it-works/ link to open resource.

UML

The UML (Unified Modeling Language) is an international industry standard graphical notation for describing software analysis and designs.

Fundamental UML models

There are five fundamental UML models:

• Use case model
• Class model,
• Sequence model
• State model
• Activity diagrams

Use case model

The use case model consists of:

• A use case diagram,
• A set of use case descriptions,
• A set of actor descriptions, and
• A set of scenarios.

A use case diagram

The use case diagram models the problem domain graphically using four concepts:

• The use case,
• The actor,
• The relationship link, and
• The boundary.

UML symbols used to model these concepts: