1. Systems Analysis and Design
Alan Dennis and Barbara Haley Wixom John Wiley & Sons, Inc.
Slides by Fred Niederman
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Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.

2. Introduction
Chapter 1
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
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3. Key Ideas
The systems analyst is a key person analysing the business, identifying opportunities for improvement, and designing information systems to implement these ideas.
It is important to understand and develop through practice the skills needed to design and implement new information systems successfully.
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.

4. THE SYSTEMS DEVELOPMENT LIFE CYCLE
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5. Project Phases Planning Analysis Design Implementation
Why build the system?
Analysis
What, when, where will the system be?
Design
How will the system work?
Implementation
System delivery
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.

6. A “Simple” Process for Making Lunch
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
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7. Planning Identifying business value Analyse feasibility
Develop work plan
Staff the project
Control and direct project
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.

8. Analysis Analysis Information gathering Process modeling Data modeling
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
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9. Design Physical design Architectural design Interface design
Database and file design
Program design
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10. Implementation Construction Installation
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
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11. Processes and Deliverables
Product
Planning
Analysis
Design
Implementation
Project plan
(requirements)
System proposal
(function spec)
System spec
(detailed design)
New system &
Maintenance plan
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
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12. SYSTEM DEVELOPMENT METHODOLOGIES
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13. What Is a Methodology? A formalised approach or series of steps
Examples
Process-centred
Data-centred
Object-oriented
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14. Waterfall Development Method
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15. Pros and Cons of the Waterfall Method
Identifies systems
requirements long
before programming
begins
Design must be
specified on paper
before programming
begins
Long time between
system proposal and
delivery of new
system
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16. Alternatives to the SDLC
Parallel Development
Rapid Application Development (RAD)
Phased Development
Prototyping
Spiral Development
Packaged Systems
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17. Parallel Development Method
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18. Pros and Cons of Parallel Development
Reduces Scheduled
Time
Still Uses Paper
Documents
Less Chance of
Rework
Sub-projects May Be
Difficult to Integrate
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19. Rapid Application Development
CASE tools
Joint application design (JAD) sessions
Fourth generation/visualisation programming languages
Code generators
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20. Three RAD Categories Phased development Prototyping
A series of versions
Prototyping
System prototyping
Throw-away prototyping
Design prototyping
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21. How Prototyping Works
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22. Throwaway Prototyping
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23. Criteria for Selecting the Appropriate Methodology
Clear user requirements
Familiar technology
Complexity
Reliability
Time schedule
Schedule visibility
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24. Summary The Systems Development Lifecycle: Development methodologies:
Planning, Analysis, Design, and Implementation
Development methodologies:
the waterfall method,
the parallel development method,
the phased development method,
system prototyping and
design prototyping.
PowerPoint Presentation for Dennis & Haley Wixom, Systems Analysis and Design
Copyright 2000 © John Wiley & Sons, Inc. All rights reserved.