UML

1
UML

• Dr. Nigel Trodd
• Coventry University
• United Kingdom

2
Introduction

• Analysts solve problems.
• Firstly, you define a problem.
• And then, you ask the right question.
• Only then can you start to think about how to
  solve a problem.

3
Learning objectives

• In this lesson you will critically examine a
  formal specification language for IS modelling.
• On completing this lesson you should be able to
• Identify exemplify the application of Unified
  Modeling Language (UML)
• and appreciate some of its weaknesses.

4
Unified Modelling Language
5
UML

• Use case diagrams
• Class diagrams
• Object diagrams
• Sequence diagrams
• Collaboration diagrams
• Statechart diagrams
• Activity diagrams
• Component diagrams
• Deployment diagrams

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Use case diagrams
7
Drawing use case diagrams

• Hand-drawn sketch
• Identify actors
• Then Use-cases
• Draw associations between actors and use-cases
• Document and store

8
Using use case diagrams

• Common Applications
• Overview diagram indicating major usage
  requirements
• Analysis of usage requirements of an existing
  system
• Common Misapplications
• Process diagramming
• Diagramming without supporting
• use cases

9
Sequence diagrams

• Usage scenarios
• The logic of methods
• The logic of services

10
Data flow diagrams Activity diagrams
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Class diagrams
12
but
13
but

• GIS attracts analysts from many disciplines and
  with various technical backgrounds
• Many of them are not familiar with UML
• You might be one of them wish to find out
  more...
• UML tutorial http//atlas.kennesaw.edu/dbraun/csi
  s4650/AD/UML_tutorial/index.htm