CHAPTER 13 Systems Analysis and Design

In this chapter, we defined the terms of system and systems analysis and design. Besides that, we also described the systems life cycle, prototyping and rapid application development.

1. System is a collection of activities and elements organized to accomplish a goal.

2. Systems analysis and design is a six-phase problem-solving procedure for examining and improving an information system.

3. The six phases make up the systems life cycle.

4. The phases are as follows:

• Preliminary investigation: The information problems or needs are identified.
• Systems analysis: The present system is studied in depth. New requirements are specified.
• Systems design: A new or alternative information system is designed.
• Systems development: New hardware and software are acquired, developed, and tested.
• Systems implementation: The new information system is installed and adapted to the new system, and people are trained to use it.
• Systems maintenance: In this ongoing phase, the system is periodically evaluated and updated as needed.

System life cycle

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5. Prototyping means to build a model or prototype that can be modified before the actual system is installed. 

6. Rapid applications development (RAD) involves the use of powerful development software, small specialized teams, and highly trained personnel.

Citation: Computing Essentials 2011