Basic Concept of System
Before studying what that Information Systems Analysis and Design, first we have to know what that system and what that information.
What is system
There are two approaching to definition of system:
1.Representing an unity from some definition element or subsistem emphasizing at component or its element
2.Representing an procedure to reach the target of definition emphasizing its procedure.
Characteristic System
Characteristic a system can be explained as follows:
1. Components
Components which interact, what each other working along to form an unity
2. Boundary
Limiting system with environmental or other system outside its.
3. Environments
environment which always influence operaasi of system.
4. Input
Entered energy into system can in the form of treatment input and signal input. The treatment input is entered energy system to can walk. While signal input is energy which in process to yield output.
5. Output
Result from processed energy and classified is become an output which good for and rest of dismissal.
6. Process
Change an input become output.
7. Target/goal
Otherwise have the target then system operation there will be no utilizing of. System succeed if it have reach the target its goal.
8. strategy
To reach made cool to be target to be needed by an strategy to be the target can reach.
Classification System
1. Abstract System: system which in the form of idea or idea- idea which do not see physically.
2. Physical System: system visible and real system with eye, and every creature can see it ( Example: System Computer)
3. Natural System: system that happened through natural process when human don’t do anything. (Example: System of Galaxi).
4. Human Made System: system designed by human being (system machine), example: Information System.
5. Deterministic System: operating with behaviour which have earned estimated (example: System Computer).
6. Probabilistic System: system which condition of its future doesn’t earn estimated because containing probability element. (Example: Human System).
7. Close System: system which don’t correlate and don’t affect with external system of it. Theoretically the system is exist, but in reality there is no really system closed, existing only system closed relatively (relatively closed, do not really closed).
8. Open System: system which imbued and coresponding with external environmen.
Information
Information is processed data become more form good for and more meaning to accepting it.
Quality Of Imformation
To get information which with quality hence have to fulfill:
Accurately
Information free from mistakes and do not deflect or mislead
Punctually
Incoming information at receiver may not lose time
Relevantly
Information have benefit for its usage
