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Information System Concepts

Information System Concepts - Introduction to Information System Concepts

Types of Information Systems

Internal Information

External Information

Information Systems

Factors - Information Requirement

Operational Function

Types of Decision Making

Programmed Decisions. Non-Programmed Decisions.

Level of Management Activity

Strategic Level or Top Level. Tactical level or Middle Level. Operational Level or Supervisory Level.

Computer Based Information Systems

Definition. Components. Areas - Computer Based Applications. Hardware. Software. Data. Procedures. People. Finance and Accounting. Marketing and Sales. Manufacturing. Inventory / Stock management. Human Resource Management.

Types of Information Systems

Information System Levels. Information System - Categories. Top Level Management. Midlle Level Management. Supervisory Level Management. Operation Support Systems. Management Support Systems. Office Automation Systems. Strategic Level. Tactical Level. Operational Data. Transaction Processing Systems. Management Information Systems. Enterprise Resource Planning Systems. Definition. Types of MSS. Definition. Types of Operations. Benefits - OAS. Building Blocks - OAS. Definition and Activities. TPS - Components. TPS - Features. Definition. Functions. Charecteristics - Effective MIS. Misconceptions - MIS. Prerequisites - MIS. Constraints - Operating an MIS. Effects of using Computers - MIS. Limitations - MIS. Definition. Objectives. Integration of Various Business processes. Myths of ERP System. Charecteristics - ERP System. Features - ERP System. Benefits - ERP System. Limitations - ERP System. Decision Support System. Executive Information System. Expert Systems. Document Capture. Document Creation. Receipts and Distrubution. Filling, Search, Retrieval and Follow up. Calculations. Recording Utilization of Resources. Text Processors and related systems. Electronic Document Management Systems. Electronic Message Communication Systems. Teleconferencing and Video Conferencing Systems. Inputs. Processing. Storage. Outputs. Large Volume of Data. Automation of Basic Operations. Benefits are easily measurable. Sources of Input for Other Systems. Management. Information. Systems. Determination of Information needs. Information Use. Management Oriented. Management Directed. Integrated. Common Data Flows. Heavy Planning Component. Sub System Concept. Common Database. Computerized. Database. Qualified System and Management Staff. Support of Top Management. Control and Maintanance of MIS. Evaluation - MIS. Speed of processing and retrieval of data increases. Scope of Analysis widened. Complexity of system design and operation increased. Integrates the working of different Information systems. Increases the effectiveness of Information systems. More Comprehensive Information. Business System. Production. Maintanance. Quality Control. Marketing. Finance. Personnel. Consolidation of Business Operations. Flexible. Modular and Open. Integrated. Best Business Practices. Better use of Organizational Resources. Lower Operating Costs. Proactive Decision Making. Decentralized Decision Making. Enhanced Customer Satisfaction. Flexibility in Business Operations. Definition. Charecteristics. Components of DSS. Examples - DSS - Accounting. Definition - EIS. Definition - Executives. Charecteristics - EIS. Executive Roles and Decision Making. Executive Decision Making Environment. Definition. Business Applications. Need - Expert Systems. Benifits - Expert Systems. Expert System Development - Potential Qualification. Components - ESS. Components. Definition. Data Gathering and Processing. incl Programmed Decision Systems. Semi structured and Unstructured Decisions. Flexibility to adapt to changing needs. Ease of Learning and use. The user. Database. Planning Languages. Model Base. Cost Accounting System. Capital Budgeting System. Budget Variance Analysis System. General Decision Support System. Strategic Planning. Tactical Planning. Fire Fighting. Charecteristics of Types of Information used for decision Making. Differntiate between EIS and Traditional Information Systems. Contents - EIS. Accounting and Finance. Marketing. Manufacturing. Personnel. General Business. Availability. Complexity. Domain. Expertise. Structure. Knowledge Base. Inference Engine. Knowledge Accquisitiion Sub - System. User Interface. Electronic Mail. Fascimile (Fax). Voice Mail. Desimination. Storage. Evaluation Indexing and abstraction. Manager. Staff Specialists (Analysts). Levels of Implementation. General Purpose Planning Languages. Special Purpose Planning Languages. Lack of structure. High Degree of Uncertainity. Future Orientation. Informal Source. Low Level of Detail. Features. Physical Level. Logical Level. External Level. Electronic Transmissions. Online Development and Editing. Broadcasting and Re-routing. Integration with other Information Systems. Portability. Economical.


Types of system

Classification. Interactive Behavior. Elements. Degree of Human Intervention. Working / Output. Open. Closed. Abstract. Physical. Manual. Automated. Deterministic. Probabilistic. Interacts freely with environment. taking Input - Returning Output. Change in environment - Change in system. Influenced by elements outside system Boundary. Information Systems. Does not Interact with change in Systems. does not change with change in environment. Finally Run down or disorganized. Movement to disorder is is increase in ENTROPY. Conceptual or Model. Orderly Arrangement. Interdependant Ideas or Constructs. Tangeable Elements. Operate Together. Accomplish Objective. Display activity/ Behavior. Parts interact to achieve Objective. Carried out by Human Efforts. Data Collection. Maintanance. Final Reporting. Computers or Microprocessors are used. to carry out all the tasks. Not 100% automated. Reasons - computers. Predictable Manner. Interaction amongst the parts - Known certainity. Description of - given point plus description. Computer Program according to set of instructions. Probable Behaviour. Certain Degree of Error attache to what system will do. Average Demand, Average time for replenishment, Instructions given to human. Quantitative Measure. Disorder in a system. Decay or disordered or disorganized. Ideas about god. Circulatory Systems. Transportation System. Weapons System. Handling Huge Volumes of Data. Storing Enormous Volume of Data. Quick and accurate processing of Data. Quick Retrieval of information on query. quick - effiecient transportation of Data. Quck decision making - Tools - For decsion making. Next state known with certainity. Negative ENTEROPY - Maintanance. Offsetting increase in entropy. Inputs of Matter and Energy. to repair replenish and maintain system.

Definition of a System

Orderly Arrangement. Set of Interrelated and Interdependant Elements. Operate Collectively. Accomplish some common purpose or Goal. Human System, Busines system, Computer Based Information System.

General Model of a System

Input. Processing. Storage. Output. Feedback. Data Flowing. Manipulating Input. Holding information. Information flowing. Into System. More Useful Form. Use at Later date. Out of the System. From Outside.

System Environment

System Definition. System Boundary. Subsystem. Supra Syatem. System Stress and System Change. Definition. Charecteristics-Sub Systems. Inventory Buffer - Waiting Lines. Slack and Flexible Resources. Standards. Definition. Sub System. Interfaces. Decomposition. Simplification. Decoupling.


Definition. Attributes of Information. Rate. Availablity. Purpose. Mode and Format. Decay. Rate. Frequency. Completeness. Reliability. Validity. Quality. Transperancy. Value of Information. Adequacy.