Object Oriented Systems Analysis and Design

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Object Oriented Systems Analysis and Design

• Practical work
• Lecture 1b

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Week 1 Seminar Aims

• Reminder of the outline course structure. (More
  detail in the lecture)
• Motivate you to learn
• Introduce the idea concepts of a System and a
  Model and associated terminology.
• Develop a strategy to win the lottery

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Module Aims Outcomes

• To give you an appreciation of the issues and
  processes of modern software development
• To equip you with the tools and knowledge to
  carry out successful analysis and design
  activities
• To enable you to implement successfully object
  oriented designs in an appropriate programming
  language (Java)

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Module Organisation

• This is a 30 credit module
• Each week
• 2 hr Lab/Seminar
• Frequent Quizzes
• 9 hours self study

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Shoot
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Exercise what is a System?

• In Pairs
• Write down 3/4 characteristics of a system.
• Write down a definition of a system
• Pyramid - share with another pair

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System characteristics

• A system has some purpose
• Components which are..
• Connected and ..
• Organised in some way
• There is a boundary to the system

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System Definition
An organised assembly of components which are
interconnected for a purpose
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Exercise

• Which of the following are systems?
• 1. The spare parts in the store of a garage
• 2. A home computer
• 3. Mathematics
• 4. A small wood
• 5. Activities needed to get you to college on
  time

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Summary

• The idea of a system is very important.
• Organised components, interconnected for purpose
• Boundary / environment
• Synergy / systemic properties
• Feedback (positive / negative)

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Exercise In groups

• For either the UK Education system or a Gas
  Domestic central heating system
• Identify
• components
• interconnections
• Purpose
• Where the boundary is
• External influences in the Environment
• Represent it on a diagram transfer it to a
  flipchart. You will explain this to the rest of
  the class.

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Models
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Qualities of a model

• Reduce complexity of reality
• Constructed for purpose
• Purpose/ assumptions explicit
• Scope applicability known
• Ideally predictive

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Summary

• Systems - What why
• Models - What Why
• Modelling systems

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Directed Study

• Read OOSAD booklet Ch 1 2 and complete
  Exercises 1.1-1.7 and 2.1-2.4
• Do Quiz on Chapter 1
• BUY BlueJ book Read Try Chapter 1