Summary Of Monday 16th Feb 09

What Is A System ?

A System can be defined in two viewpoints, that is in procedural approach and component/element approach. System in procedural approach is a working network from interconnected procedures which used to achieve particular objective. Where, procedure is an appropriate sequence of instruction phase that represent what has to be done, who done it, when it‘s getting done, and how it’s being done.

While, system from the component/element viewpoint, is a group of element-element that interacted each other in order to accomplish certain goal. Where the difference of goal and objective is that goal aims in a longer period, differ from the objective that often just aims in a short period.

Characteristic Of A System
• Components
The components here, interacted each other to form one entity. The example is the Supra System.
• Boundary
Boundary here, means to limit system with other system / its external environment.
• Environments
Anything outside the bound of the system that can affect the operation of the system.
• Interface
Become a link media between one sub system to another.
• Input
Energy that was entered into a system can be in the form of handling input or signal input.
• Output
The result from processed energy that was classified become useful output and leftover.
• Process
Make output from the input.
• Objective / Goal
If it doesn’t have a goal then the operation of the system has no meaning. A system can be success if it has reach its objective / goal.

System Classification
Definition 1 :
• Abstract System means one system can be a speculation / idea. Ex : Religion System, Custom System.
• While Physical System means a system that exist physically. Ex : Computer System, Accountant System, Production System, etc.
Definition 2 :
• Natural System means a system that was born through natural process. Ex : Earth Rotation System, Gravitation System, etc.
• While Artificial System means a system that involve the human being with machinery. Ex : Computer System, Information System, etc.
Definiton 3 :
• Spesific System means a system that operates with a predictable behaviour in the future. Ex : Computer System, etc.
• While Unspesific System means a system that its future condition is unpredictable. Ex : Product Selling System, etc.
Definition 4 :
• Closed System means a system that has no relation and influence on external environment.
• While Opened System means a system that has a relation and influence on external environment.

What Is An Information ?
Information is a data that was processed into a more useful form and have a better meaning for person who receive it.

Information Life Cycle
It begins with there’s input (in form of a data) to be processed (also with the database). Then the process’ makes an output (in form of an information). Where the output reach the user who needs it. And the user makes a decision to it. Which the decision makes a result action. And the result of course leads to make another data. So this data, can be used again to become input of another process.

Information Quality
• Accurate
Means the information must be clear from any mistakes and not be deluded.
• On Time
Means information that arrives mustn’t be overdue.
• Relevant
Means information must have advantage for its usage.

And the Information Value determined from two matters, that is the benefit and the cost to obtain them. Information can be more valuable if the benefit outpoints the expenses.