SYSTEMS

2008-11-18T06:29:00.000-08:00

SYSTEM is an interrelated set of components that function together to achieve an outcome.
Components:
INPUT
PROCESS
OUTPUT

Computer System – Terminal + Computer + File
Business System – Policies + Procedures + methods + machines +
etc. to achieve a goal
Information System – Collect + Process + Store + Output the
needed information to complete a business task
Components include:
a. Work Practice – methods and procedures used by people to
perform work.
b. Information – can include formatted data, text, images, and
sounds
c. People – persons, who enter, process, and use data.
d. Information Technology – includes hardware and software
that perform one or more data processing tasks.

Elements of the Systems
1.Purpose – the reason it exists or the reference point for measuring its success.
2.Subsystems – parts or elements which perform specified tasks that are compatible with the goals of the larger system of which these are parts.
3.Environment – the people, facilities, rules, policies, and the regulations that surround a system.
4.Boundary – the perimeter or line of demarcation, between a systems and the environment.
5.Connections – transmit the flow of material and information that coordinate the systems components.
6.Control Mechanism – rules and logic that govern the individual subsystems and the interactions among them.

Below are the reasons for the need of an information system:
1.Growing size of the organization and the number of competitors
2.Growing ability of computers to process large amount of data with great speed.
3.Dramatic increase in volumes of data generated.
4.Advances in communication technologies to permit faster data transmission.
5.Increase in pace of business transactions
6.Much more sophisticated technology today

Systems Analysis & Design

SYSTEMS