SYSTEM ANALYSIS AND DESIGN

 System development involves conceiving an information system project, implementing it
and maintaining to the user’s satisfaction. These information systems are developed to solve a
problem, to make use of an opportunity, to comply with a requirement and to effect broad
improvement in business process.

Meaning of a system:

A system is a group of inter-related parts or components working together towards a
common goal by accepting inputs and producing outputs in organize transformation process.

• The parts perform some function: there must be input and output flows to and from the system.
• The performance of this function must be measurable, which implies monitoring.
• The parts are organized, which implies control of actions and a decision – taking process.
• The organized of parts also means that if a part has no interaction or connection with other parts, has no interaction or connection with other parts, it is not in the system. The system must therefore have obituaries.
• The environment beyond the boundaries can affect and be affected by the system.

Different resources are available for the system.

• A number or sub – systems exist which interact with each other. There are four categories in particular.
• The information sub – system deals with the flow of information between parts of the system, and between the system and its environment.
• The control sub – system experts control on the system.
• The logistic sub – system collects resources , and feeds the system with resources.
• The process sub – system provides the functional output from the system. Thus, s system essentially a group interdependent components together to achieve a specific and common objective. A collection of components that work together to realize a specific and common object forms a system. Basically there are three major components in every system, namely input, processing and output.
  

In a system the different components are connected with each other and they are
interdependent, For example, a human body represents a complete natural system. We are also
bound by much national system such as political system, economic system, and so forth. The
objective of the system demands that some output is produced as a result of processing the
suitable inputs.