Systems Analysis and Design in a Changing World, Thursday, Feb 15

1

• Systems Analysis and Design in a Changing World,
  Thursday, Feb 15

2
Todays Schedule

• Introduce UML
• Modeling
• Types of Diagrams
• Use Visual Paradigm to build Activity Diagrams

3
Unified Modeling Language (UML)

• Standard  language for specifying, visualizing,
  constructing, and documenting the artifacts of
  software systems
• Provides ready-to-use, expressive visual modeling
  language to develop and exchange meaningful
  models.
• Independent of particular programming languages
  and development processes.

4
Modeling in UML

• Functional Model
• Showcases the functionality of the system from
  the user's Point of View.
• Includes Use case diagrams.
• Object Model
• Showcases the structure and substructure of the
  system using objects, attributes, operations, and
  associations.
• Includes Class Diagrams.
• Dynamic Model
• Showcases the internal behavior of the system.
• Includes sequence diagrams, activity diagrams and
  state machine diagrams.

Diagram is a partial graphical representation of
a system's model
5
UML Diagram Hierarchy
6
UML 2.0 Diagrams

• Static Application Structure Diagrams
• Class Diagram, Object Diagram, Component
  Diagram, Composite Structure Diagram, Package
  Diagram, and Deployment Diagram. 
• General Behavior Diagrams
• Use Case Diagram (used by some methodologies
  during requirements gathering) Activity Diagram,
  and State Machine Diagram. 
• Interaction Diagrams (all derived from the more
  general Behavior Diagram)
• Sequence Diagram, Communication Diagram, Timing
  Diagram, and Interaction Overview Diagram.

7
Activity Diagram, Models a Workflow

• Communication tool
• Visualize process
• Review with users
• Shows
• User Activities
• Sequential Flow

8
How to draw UML activity diagrams

1. Identify the scope
2. Add start and end points
3. Add activities
4. Add transitions from the activities
5. Add decision points
6. Identify opportunities for parallel activities

Lets do Critical Thinking, 10, pg 147 together
and in Visual Paradigm
REF http//www-128.ibm.com/developerworks/webserv
ices/library/ws-tip-drawuml/
9
For Tuesday, February 20

• Begin Reading Chapter 5, Modeling System
  Requirements, Pg 151-156
• Assignment 5 Due Monday, Feb 19, 1130 pm