INFORMATION SYSTEM (IS)

System

An general sense, system from latin systēma, in turn from greek σύστημα systēma) is a set of interacting or interdependent entries, real or abstract, forming an integrated whole.

The concept of an "integrated whole" can also be stated in terms of a system embodying a set of relationships which are differentiated from relationships of the set to other elements, and from relationships between an element of the set and elements not a part of the relational regime.

System concepts

Environment and boundaries

system theory views the world as a complex system of interconnected parts. We scope a system by defining its boundary; this means choosing which entities are inside the system and which are outside - part of the environment. We then make simplified representations (models) of the system in order to understand it and to predict or impact its future behavior. These models may define the structure and/or the behavior of the system.

Natural and man-made systems

There are natural and man-made (designed) systems. Natural systems may not have an apparent objective but their outputs can be interpreted as purposes. Man-made systems are made with purposes that are achieved by the delivery of outputs. Their parts must be related; they must be “designed to work as a coherent entity” - else they would be two or more distinct systems

Open system

An open system usually interacts with some entities in their environment. A colsed systemis isolated from its environment.

Process and transformation process

A system can also be viewed as a bounded transformation process, that is, a process or collection of processes that transforms inputs into outputs. Inputs are consumed; outputs are produced. The concept of input and output here is very broad. E.g., an output of a passenger ship is the movement of people from departure to destination.

Subsystem

A subsystem is a set of elements, which is a system itself, and part of a larger system.

Information

 

an computer sense, information are encode for processing then have a benefit and the aim for usage, to make decission. information value determited from two matter, there are expense to get it and the benefit for usage.information doesnt relevan for its usage if the information dificult and expensiv get it. information quality are depend from three matter there are, accurate, timely, and relevant.

1. accurate

the information must be clear the meaning, and doesnt make confused.

2. timely

that mean information should news and didnt worn out,, because information are the basis for deccision making.

3.relevant

the information must have a benefit for usage, benefit congeniality is deferent for other user. 

Information cycle

Data is form which still raw not yet earned to tell a story many so that require to be processed is furthermore data processed to through a model to be yielded by information. Data processed to yield information a certain process model. Processed data through a model become information, receiver later then accept the information, making a decision and conduct action, which mean yield an other action to make a number of data return. The data will be arrested as input, re-processed pass a model forming a cycle.

 

then the information system (IS) are

an integrated set of components for collecting, storing, processing, and communicating information. Business firms, other organizations, and individuals in contemporary society rely on information systems to manage their operations, compete in the marketplace, supply services, and augment personal lives. For instance, modern corporations rely on computerized information systems to process financial accounts and manage human resources; municipal governments rely on information systems to provide basic services to its citizens; and individuals use information systems to study, shop, bank, and invest.