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Information systems and business systems connects management and executive functions.

Every business system under which it is means any economic entity can be viewed as a composition of three parts or subsystem:
– executive (executive)
– management
– information subsystem.

INFORMATION SYSTEMS AND BUSINESS SYSTEMS

– The executive (executive) subsystem is aimed at achieving the specific goal of the business system.
– The purpose of the control subsystem is the realization of control functions.
– The quality of business decision making is contributed by the information subsystem, that is, the business information system (BIS – Business Information System).

– Business information system connects management and executive functions by:
formed information based on business data is made available to the management subsystem.

– These tasks accomplish the business information system by collecting, processing and arranging data in order to obtain business information and making them available to the management subsystem.




BUSINESS INFORMATION SYSTEM MUST BE SETTLED AS:

– to speak the manager’s language,
– it is easy to present the given information,
– that it is reliable,
– to enable the display of processed information at very short time intervals.

COLLECTING, PROCESSING AND USING INFORMATION IN BUSINESS INFORMATION SYSTEM

– Data processing is the process of converting data into information.
– Decision Making, within the business system business system, is the process of converting information into decisions.

DATA PROCESSING

Data processing in the widest sense includes:
– data collection;
– preparation of data for processing;
– data processing in the narrow sense;
– presentation of processing results.




DESIGN OF BUSINESS INFORMATION SYSTEMS

The design of the information system implies its construction by accepting:
– partial or
– an integral approach.

PARCIAL ACCESS

– A partial approach, commonly referred to as hierarchical, is generally applied to
individual applications.
– This is about the design, construction and design of autonomous information systems.

PARCIAL ACCESS

– The basic feature of the partial approach in the design of the business information system is the vertical flow of information within certain functional areas, without the possibility of communicating with other parts of the work process.




INTEGRAL ACCESS

Today, mainly in the design of the information system is applied integral
an approach whose basic features are:
– the business entity is regarded as a connected and dependent set of multiple subsystems,
– the information system is designed, built and projected as a single entity.

Very important features of this approach are:
– development of communication between information users;
– possibility of vertical and horizontal communication.

An integral approach in the design of the information system can be realized as:
– centralized
– distributed




CENTRALIZED INFORMATION SYSTEMS

– Centralized information systems are based on a single database that provides and covers the information needs of all users in one business system.

DISTRIBUTED INFORMATION SYSTEMS

– The basis of distributed information systems consists of dividing a database, or multiple independent databases, into individual information subsystems, and integrating natural data flows between individual subsystems.

– In practice, fully or partially distributed information systems are implemented.
– Completely distributed distributed information information system is
organized as a network of computers in all information subsystems that are completely and directly connected.

– A partially distributed information system is built with distributed data processing processes and distributed information generation, and a common database of related data for the needs of other subsystems or multiple levels of management.




TYPES OF BUSINESS INFORMATION SYSTEMS

– Different levels of development and dynamics of the information system structure have influenced the existence of a large number of different types of information systems.

Classification of information systems can be performed according to:
– orientation,
– parts of the work process that include, decision levels, …


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TYPES OF INFORMATION SYSTEMS UNDER ORGANIZATION

– Information systems focused predominantly on past events (information systems for automatic data processing);
– Information systems directed towards past and present events and future events (management information systems).

– According to the business functions that are implemented or according to the parts of the work process that they include within the business information system, it is usually possible to extract more subsystems (production, accounting, marketing, …).

According to the decision-making level, information systems can be divided into:
– information systems for operational decisions,
– Information systems for tactical decisions,
– information systems for strategic decisions.


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