Information Systems Development

An Information System Collects, Maintains, and Provides information to people. Today, many information systems are computerized. Information systems are design for those people who have very little knowledge of information technology. The five phases of information system development are

• System Analysis
• System Design
• System Development
• System Implementation
• System Maintenance

System Analysis:

• o The person who does analysis is called an Analyst. o This phase focuses on “what”.
• o Three task of this phase are

1. Defining the problem
2. Analyze current system
3. Selecting the best solution

System Design:

•  This phase focuses on “how”.
•  Main tasks in this phase are

1. Making Flow Charts and Data Flow Diagrams (DFD’s) Making User Manuals
2. Selecting the best computer language for development

System Development:

•  The person who does development is called a Programmer
•  Writing computer programs by using some computer language
•  Testing and debugging programs

System Implementation:

•  Install developed system on computers
•  Update or upgrade systems hardware if needed
•  Training of operators and users

System Maintenance:

• o After implementation if any error occurs then it will remove in this phase
• o Monitor system performance