What is a System?

A system is collection of components that interact with each other and work together to achieve a specific task.

• A system consist of 3 basic components.

• Input
• Process
• Output

• Information System  is A system which converts data in to information is known as an information system .there are two types of information systems
• Computer base system
• Manual information system

• System Development  Life Cycle
• Identification of requirements.
• Designing the solution
• Codding the solution
• Testing and debugging
• Deployment
• Maintenance

• Methods of collecting data   
• Observation
• Interviews
• Questionnaires
• Document Sample Collection  
• Prototyping

• Testing and debugging Methods
• Unit Testing
• Integration testing
• System Testing
• Acceptance Testing

• Development Approaches Types
• Direct Deployment
• Parallel  Deployment
• Phase Deployment
• Pilot Deployment