System derived from the Latin (Systema) and Greek (sustēma) is a collection of elements / elements that are interrelated and influence each other in conducting joint activities to achieve a goal.

Example:

Definition of the system according to the experts: System Definition

The system is a set of interrelated elements are bound in an inter-relationships between these elements with the environment.

The system is a collection of the unity and the relationship to one another.

System is any conceptual or physical entity that consists of parts in a state dependent on each other.

He thinks the system is logical and rational procedures for designing a circuit component connected to each other in order to function as a unit in an attempt to achieve a predetermined goal.

He thinks the system is a conceptual structure that is composed of the functions of related works as an organic unity to achieve a desired result in an effective and efficient. System Definition

He thinks the system is a set of parts to be coordinated to implement a set of goals.

He thinks the system is a set of parts which are interconnected.

He thinks the system is a series or sequence of parts which are interconnected and dependent such that the interaction and mutual influence of one part will affect the whole. 

Terms of the system: System Definition

Broadly speaking, the system can be divided into two: System Definition

Collection of elements / elements which interact with each other physically identifiable and tangible goals. 

Example: 

• Transportation system, elements: personnel, machinery, organization that runs the transport 
• Computer Systems, elements: equipment that works together to perform data processing.

B. Abstract System (ABSTRACT SYSTEM): 

The system was formed due to the implementation of the idea of ​​dependence, and can not be identified clearly, but can be described elements. 

Example: 

System of theology, the relationship between man and God.

Simple system model

Input → process → output

Example: 

• Program basic calculations we enter, after the run we get the result. 
• Student data (name, value) is processed into a list of the semester (a report).

Systems with many inputs and outputs

Example: Matrix → input many, many keluarannyapun

• Organization 
• Interaction 
• Interdependence 
• Integration 
• The ultimate goal

a. Organization 

Includes the structure and functions of the organization 

Example: System Definition

• Structure, composed of sub-subsystems
• Function, the organization will not work without the function of each section and sub sections. 

Example: 

• The function of chief executive. 

Take full responsibility for death or life company he leads.

• The function of marketing department. 

Fully responsible for the smooth product manufacturing by seeking subscriptions buyers.

• The function of finance and administration department. 

Responsible for the smooth operation of financial expenditure of the company.

b. Interaction 

Interconnectedness between the parts to one another. 

Example: 

SA with the P with ED and vice versa. 

SA: Systems Analyst, P: Programmer, DE: Data entry.

c. Interdependence 

The later one has a dependency with the other parts. 

Example: 

Interdependent marketing division with the production and finance and administration in terms of billing the customer.

d. Integrity 

An alignment between the subsystems to achieve the goal. 

Example: 

Marketing division receives an order 100 pieces of the car but could only provide 50 units. To address this issue was held in cooperation with other companies engaged in the same field.

e. Main objection (objective) 

Concentration of the same goals of each subsystem. 

Example: a company requires a concentration of purpose.

A. Deterministic system 

System where the operations (input / output) that occurs therein can be determined / known with certainty. 

Example: 

- Computer programs, perform exactly in accordance with a series of instructions. 

- Payroll System.

B. Probabilistic System 

The system input and the process can be defined, but the resulting output can not be determined with certainty; (There's always a little error / deviation from the forecast path of the system). 

Example: 

• System assessment exam 
• Marketing System

Systems that are experiencing the exchange of energy, material or information with its environment. These systems tend to have the nature of adaptation, can adjust to the environment so it can continue its existence. 

Example: 

Organizational system has the capability of adaptation. (Business in the face of changing market competition. Companies that can not adapt will be eliminated).

D. Closed System 

Physical system in which the processes that occur do not experience the exchange of matter, energy or information with the environment outside the system. 

Examples: chemical reactions in a tube insulated and sealed.

The system is closed but not closed at all to accept other influences. The system is in operation can receive from outside influences that have been defined within certain limits. 

Example: 

Computer systems. (This system only receives a predetermined input, process it and provide output which is also predetermined. Undeterred by the turmoil outside the system).

System that mimics the natural events. The system is formed based on events in nature where humans are not able to do so. In other words, artificial in nature. 

Example: 

• AI System, which is a computer program that can make the computer as if thinking. 
• Robotics system. 
• Network neutral network.

System formed from events in nature. 

Example: sea, beaches, atmospheric, solar, etc..

System behavior description that includes the participation of humans. 

This system can be described in the following ways:

• System of humans. 

Systems that emphasize human relations.

• Human-machine systems. 

The system includes the engine for a purpose.

I. Machinery systems. 

The automated system in which man has the task to begin and end the system, while the man involved also to monitor the system. Machines interacting with machines to perform some activity. Pengotomatisan makes growing importance of the organization, where the man freed from routine tasks or tasks that heavy physical. More system designers using the "Relatively Closed and Deterministic System", because the system is in the process is easier to predict the results to be obtained and more easily managed and monitored. 

Example: 

In the field of information systems, computer factors and computer programs are usually "Relatively Closed and Deterministic", but the human factor as the managers are "Open and Probabilistic Systems".

A. Blackbox Approach 

A system in which inputs and outputs can be defined but the process is unknown or undefined.

This method can only be understood by the parties in (the handle) while the outsiders only know the inputs and results. The system is contained on the lowest level subsystem.

Example: the printing of money, the digestive process.

B. Analityc System 

A method that tries to see the entire problem to investigate the relationship kesistematisan purpose of the system is ineffective and evaluation of options in the form of lack of effectiveness and cost.

In this method several steps are given as below:

a. Determining the identity of the system