System Development Concept

System  Development  Concept

Introduction: System, information System

System

The system  is derived fro Greek word “systema”, which means to “place together” i.e. an organized relationship among functioning of all units. A system is a collection of interrelated components, collaboratively work together for a specific purpose. The system is one in which data flow from one person or division to another and it can include telephone links to computer system that generate periodic reports for various user.

1.      A  system is a collection of elements or components that are organized  for common purpose in order to facilitate the flow of information.

2.      A system can be defined as any set of objects and ideas, and their interrelationships, which are ordered to a common goal or purpose.

3.      A system is a set of elements joined together for a common objective.

4.      A system can be also defined as a combination of people, device, process, and method interrelated in working towards a common goral. E.g business organization, school, college, water supply, electrical distribution, banking, all these are the examples of the system.

The system has three basic interacting components or functions:

1)     Input: It involves capturing and assembling elements that enter the system to be processed. For example, raw materials, energy, data, and human effort must be secured and organized for processing.

2)     Processing : It involves transformation processes that convert input into out put. Example is a manufacturing process, the human breathing process, or mathematical calculation.

3)     Output: It involves transferring elements that have been produced by a transformation process to their ultimate destination. Example is a manufactured product.

4)     System structure composed of following components:

1.      Goal setting: the goal setting is abstract to a system, which defines exactly what the system is supposed to do.

2.      System boundary:  The system boundary is known as the system and scope of the organization. System components exist inside the boundary and environments exist outside the boundary with which system interacts. The component within the system boundary can be changed during the system design.

3.  System environment: Anything outside the system boundary is known as the system environment. It defines the factors outside the system study that can be affect system behavior.

4.    Subsystems: A system can be made up of any number of subsystem. Subsystem is a part of a system. Each subsystem carries out part of the system function. Subsystems are important because they can help to handle systems complexity and thus improve the understanding of the by passing message between themselves. A  good system will be made up of high independent  subsystems with minimum flow  between them. Minimum flow in turn minimizes complexity and simplifies the system.

5.     Feedback: Feedback is the idea of monitoring the current system output and comparing it to the system goal. It can be defined as using variations from system goal to change system behavior. Any variations from the goal are the feedback into the system and use to adjust to ensure that it meets its goal. For this it is necessary to monitor the system whether it is meeting its goal or not.

6.     Monitoring: Monitoring is abstract to a system, which checks made to see if a system is meeting its goal.