BASIC CONCEPT OF INFORMATION AND SYSTEM Information System

BASIC CONCEPT OF INFORMATION AND SYSTEM Information System Concept

System Approach : � Procedure � A network of procedures in sequence of linked activities, gather together to achieve certain goals Element Set of interrelated components working together to achieve a particular goal

System Goals The purpose of a system is to achieve a goal or to reach objectives. Goal covers a wide scope, while objectives covering a narrow scope

System Classification Abstract Systems & Physical Systems System Abstract: The system of thought / ideas that do not seem physically. Example: theological systems. Physical Systems: Systems that are physically visible. Natural System & Man-Made Systems Natural systems: the system is going through a natural process and not man-made. Example: the earth's rotation system. Man-Made Systems: Systems that are designed by humans and involves the interaction between man and machine. Example: information systems

System Classification (2) Deterministic Systems and Probabilistic System � Deterministic system: The system operates with a certain behavior that could be predicted, the interaction between the parts can be detected with certainty than the output can be predicted Ex : Computer System using program � Probabilistic system System that the future conditions can not be predicted because it contains elements of probability. Example: Gambling

System Classification (3) Closed System and Open System � Closed system: The system is not connected and are not affected by the external environment. This system works automatically without any intervening from the outside (in fact no system is completely closed) there is only a relatively closed system � Open System: The system-related and affected by the external environment. This system accept input and produce output to the outside environment or other subsystems, so it should have good control systems

System Characteristic Component Consists of components that interact with each other and working together become a unity. The components can be composed of several subsystems / subsections, where each subsystem has a specific function and will affect the overall system. System Boundary An area which limits between one system to another system / with the outside environment. This system allows the boundary system is viewed as a limit of a system indicates the scope of the system

System Characteristic (2) External Environment System Anything beyond the limits of the system that affects the system operational. External environment can be both beneficial and detrimental. Favorable environment must be kept and maintained, otherwise adverse environment should be retained and controlled to compromised the viability of the system. Interface interface as media subsystem, which allows resources to flow from one subsystem to another subsystem. Output (output) of the subsystem will be input to other subsystems through liaison as well as to integrate subsystems become a unity

System Characteristic (3) Input Energy put into the system, can be maintenance input and signal input. Maintenance Input: the energy that entered to system to make system operate, meanwhile input signal is energy processed to obtain the output. For example, in the computer system, program as maintenance input is used to operate the computer and the data is input signal to be processed into information. Output Result of processed energy and classified as useful output and residual disposal. Output can be input for other subsystems.

System Characteristic (4) Processor A system can have a processing section that will transform inputs into outputs. A production system will process the input of raw materials and other ingredients into the output of finished goods. Accounting system will process the transaction data into financial reports and other reports required by management. Objectives A system can have a processing section that will transform inputs into outputs. A production system will process the input of raw materials and other ingredients into the output of finished goods. Accounting system will process the transaction data into financial reports and other reports required by management.

System Control Feedback Control: 1. 2. 3. 4. A characteristic measured by its output A sensor that measures the condition A control unit that compares the results of a measure with a specified standard A regulatory unit that produces an adjustment action for the next input

Feedback Control Input Proses Output Sensor Regulating Unit Control Unit Standart

Feed Forward Control System Control is carried out in the process to prevent unexpected output. Prevention Control is carried out on input to prevent unexpected output

INFORMATION The data are processed into a form that is more useful and more meaningful for those who receive Something real / real half to reduce the degree of uncertainty about the state of things / events. For example: information that states that the value of the rupiah will rise, so will reduce the uncertainty about whether an investment will be made

Information Quality Relevance Information should provide benefits to the wearer. Relevance of the information for each person different from one another Accurate Information should be free from errors and not misleading and should clearly reflect the intent. Inaccuracies may occur because of resources (data) impaired / intent to destroy, to change the original data

Information Quality (2) Component of Accurate : � � � Completeness Correctness Security

Information Quality (3) On Time � The resulting information / needs should not be too late (obsolete). Outdated information does not have a good value, so if used as a basis for decision-making would be fatal / errors in decisions and actions Economics � Information system costs will increase with time

Information Quality (4) Efficient How many units of production increased due to additional resources in the production process Trustworthy An important indicator of information system is to consider the problem of reliability Usefullness Nothing better than a accordance with criteria system designed in

Information Types 1. Content Information is usually called by the main content or subject matter of the relevant information. The subject: about activity / particular field of activity, ranging from broad to narrow subject level. 2. Form � � � � Information Description: In the story form with brief and clear sentences Recapitulation Information Image Information Model Information Statistic Information Form Information Animation Information Simulation Information

Information Types (2) Output 3. 1. Report 2. Periodic Report On Request Report Exception Report Special Report Predictive Report Anwer of questions Ex : FAQ

Information and Management Level Strategic Information For Top level and used for long time decision Tactical Information For Mid Level Technical Information For Low level

Information Values To help provide clarity of uncertainty or to reduce uncertainty so that people can make decisions with certainty and more profitable. The greater help to reduce the uncertainty the higher the value of the information.

Information Values (2) Information Values Characteristics : � Accurate � On Time � Completeness � Briefness � Compatibility

Information Follow Up Communication Storage Retrieve Reproduction

Questions 1. 2. 3. Find Defenition of System and write the source Create a case as sample of feedback control, feedforward control and prevention control Find one news and determine whether the news meets the requirements of quality information or not. explain the reason