Chapter 3: Information systems
Models for developing system
- Systems-life-cycle
- Evolution and prototyping
- A model for developing system
- Techniques for building system - analysis
- Design system
- Programming
Data model
Hierarchical model
Network model
Table model
- Entity Relationship (ER) diagram
- Building groups of relationships (step by step)
- Dealing with redundant information
Normalization
- First normal form
- Second normal form
- Third normal form
Software
- Application software
- End-user software
- System software
- System development software
Data base system versus traditional file system
- Data dictionary
- Program-file independency
- Information hiding
- View
The quality of Information system