System Analysis and Design

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Course | : | BS Information Technology | Year and Sec | : | Third Year | Subject | : | ITEC55 - System Analysis and Design | Lecture | : | One - 1 |

What is a System?
Here are some definitions of a system according to www. Dictionary.com * A group of interacting, interrelated, or interdependent elements forming a complex whole. * A functionally related group of elements, especially: 1. The human body regarded as a functional physiological unit. 2. An organism as a whole, especially with regard to its vital process or functions. 3. A group of physiological or anatomically complementary organs or parts: nervous system or skeletal system 4. A group of interacting mechanical or electrical components 5. A network of structures and channels, as for communication, travel or distribution. 6. A network related computer software, hardware and data transmission devices. * An organized set of interrelated ideas or principles.

DEFINITION OF SYSTEM
Definition number one (1) Systems are developed to satisfy a set of requirements that meet q need. It exists in an environment, and has operators and users. The system provides feedback to the operators and services to the users. Sometimes, a system contains many subsystems.

Definition number two (2) A system is a set of manual and automated procedures and devised for conducting business. Some procedures may support monthly information gathering others may consist of calculations, summarizations, and report creation, each with a respective set of required decision. A system can be totally manually process, a completely automated process, or a combination somewhere in between.

Definition number three (3) A system has three (3) components: * Input * Process * Output

Definition number four (4) A system is a collection of parts which interact with each other to function as a whole.

Definition number five (5) A system is a set of interrelated, interacting

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