Basic Concept of Analysis and design Information System
Definition System can be seen from two approach:
1. Definition of system based on approach of Procedure
In this approach, system interpreted by as a network work from procedures which is interaction and work along to finish a specific-purpose or goal. A procedure is a correct medley of instruction steps explaining what which must be done, who which doing, when which be done and how to do it.
2. Congeniality of system based on approach of element
In this approach system is a set of elements which is have interaction to reach specific-purpose or goal.
Requirement System:
a. System have to be formed to finish target.
b. Element system must have plan which specified.
c. Existence of relation among system element.
d. Basic Element of process (information current, material and energy) more important than system element.
e. Target of more important organization from target of element.
CHARACTERISTIC SYSTEM
• Component
A system consist of a number of component which interact, cooperate forming one unity. System components can be in the form of a subsystem or parts of from system. Every system always consist of subsystems. Every subsystem have characteristics of system to run a certain function and influence process system as a whole.
• Boundary
Boundary System represent area limiting between a system with system the other. System boundary enable an system viewed as a unity, because with this system boundary of duty and function of subsystem which is one other differ but remain to interact. Boundary system can show scope of system.
• Environment
Everything outside from system boundary influencing operation from an system. Environmental outside this system can have the character of to profit or harm.
• Interface
Connecting media between one subsystem with the other subsystem. To form one unity, so that resources emit a stream of from subsystem what is one to the other subsystem. Equally output from an subsystem will become input of the other subsystem.
• Input
Entered energy into system can in the form of treatment input and signal input. Input of Signal is energy processed to be got output. For example in computer system, program is maintenance input used to operate its computer and data input signal to be processed to becoming information.
• Output
Output is result of from energy processed by system. Example, Information released by computer. And example Output of no use is hot which released by computer.
• Process
Processing input to become output. Example of CPU Computer.
• Goal
Every system have a purpose and or target influencing input required and yielded output. Equally an system will be told succeeding, if operation of that system exactly to the goal or its target.
CLASSIFICATION SYSTEM
· Abstract System: system which in the form of idea or idea- idea which do not see physically.
· Physical System: system visible and real system with eye, and every creature can see it (Example: System Computer)
· Natural System: system that happened through natural process when human don’t do anything. (Example: System of Galaxi).
· Human Made System: system designed by human being (system machine), example: Information System.
· Deterministic System: operating with behaviour which have earned estimated (example: System Computer).
· Probabilistic System: system which condition of its future doesn’t earn estimated because containing probability element. (Example: Human System).
· 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).
· 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 INFORMATION
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
value information determined from two matter that is benefit and expense get it
Information will be valuable if big added significance of expense get it
