Chapter 1: Basic Concept (Part1)

A. Basic Concepts of Information System
• Definisi System
system is a network of work procedures related to completing a particular purpose
* procedure is the sequence of operations klerikal involving several people in one or more departments that are applied to ensure the handling of business transactions
* procedure is the correct sequence of stages instruksi that explain what should be done, what, when, and how do it.

• Characteristics of System
System has a particular characteristics, namely component, boundary, environments, interface, input, output, process and objectivies or goal.
• Component System
system consisting of a number of components or elements that interact each other, work together and form a unity. Elements of the system can be a subsystem. A system can have a larger system called the supra system. Example: if the system is seen as an accounting system, the company is a supra-systems and industry is of supra supra system

• Boundary
Boundary system is a restriction to limit the area between a system with other systems, or the area between the limit of a system with the environment outside.

• Environments
Environment the system is that there is anything outside the boundaries of the system that affect the operating system. Outside environment can be beneficial and detrimental. The beneficial factor environment is the energy of the system and must be maintained. But, the detrimental factor environment should be arrested and in order not to disrupt the viability of the system.

• Interface
Interface is the inter-media subsystem. Output from the subsystem can be the input for another subsystem.

• Input
Input is the energy put into the system. Maintenance input is inserted so that the energy system can operate. Signal input is energy with processed to obtain the output.

• Output

Output is the result of the energy processed and classified into useful output, and the remaining disposal

• Process
A System have a processing section that will be entered into the output

• Objectives or goal
System has a certain goal or target. Goal are set inputs required and the system output to be generated system.

• Classified of System
System can be classified from several perspectives, among :
• The system is classified as an abstract system and physical system
Abstract system is a system in the form of ideas, such as a system of thought in the form of relationship with the gods.
Physical system is a system that is physically

• The system is classified as a natural system and human made system
natural system is a system through a natural process, not man made.
Human made system is a system designed by humans

• The system is classified as a deterministic system and probabilistic system
Deterministic system operates with a certain behavior that can be predicted.
Probabilistic system is not necessarily the system that conditions can not be predicted.

• The system is classified as a closed system and open system
Closed system is a system that is not related by the environment outside.
Open system is a system related and affected by external environment.


B. Basic Concept of Information
Information is data processed into a form more useful and more meaningful for those who receive them. Source of information is data. Data is the fact that a real incident

• Life cycle information
Data is processed through a model into the information, the recipient will receive the information, make decisions and take actions that result in a meaningful action that will create a number of re-data. Data input is considered and processed again through a model and so create a cycle

• Quality of information
Quality of information depends on three things that is accurate, timeliness, and relevance.
- Accurate means should be free from error and bias, or misleading.
- Timelines means that the information that came in the recipient can not be delayed. The old information will not have any value anymore.
- Relevance means that the information should have benefits for users

• Value of information
Value of information are determined from two things, namely to get the benefits and costs. Information is a valuable benefit if more cost effective than to get it. Measuring the value of information is usually with a cost analysis or costbenefit Effectiveness

Finally…

After three years course in the Department of Computer Science Udayana, finally I have a blog also.This blog I make because a claim from one of the subjects, which require that the blog has to post the lecture material that is given in the English as the value of quis.

But not no problem, late is better than not, all right?

I think, ADSI course gives me more experience (can create a blog, learn the English language again, etc). Over all ADSI is the main top !!