Lecture #1 - Introduction to Information System

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Presented ByMrs.Vasanthi MuniasamyINFORMATION SYSTEM A combination of HardwareSoftwareInfrastructure and Trained personnel organized to facilitate PlanningControlCoordination and Decision Making in an organization.

DEFINITION: .Executive Support System(ESS)Management Information System(MIS)Decision Support System(DSS)Knowledge Management System(KMS)Transaction Processing System(TPS)Office Automation System(OAS)Process Control System(PCS)Enterprise Collaboration System(ECS)

TYPES OF INFORMATION SYSTEMS AnExecutive Support System ("ESS")is designed to help senior management make strategic decisions.

.Executive Support SystemAmanagement information system (MIS)is mainly concerned with internal sources of information and summarizes it into a series of management reports.


Management Information SystemDecision-support systems ("DSS") are specifically designed to help management make decisions in situations where there is uncertainty about the possible outcomes of those decisions.

.Decision Making SystemKnowledge Management Systems ("KMS") exist to help businesses create and share information.


Knowledge Management SystemTransaction Processing Systems ("TPS") are designed to process routine transactions efficiently and accurately.

.Transaction Processing SystemOffice Automation Systems are systems that try to improve the productivity of employee who need to process data and information. .Office Automation SystemProcess Control SystemMonitor and control industrial processes. Examples: Petroleum Refining, Power generation, and steel production systems

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Support team, workgroup and enterprise communications and collaboration. Examples: E-Mail, Chat and video conferencing.

.: Enterprise Collaboration SystemBasically there are 5 components available.HardwareSoftwareDataProceduresPeople

5 .Components of Information SystemThe term hardware refers to machinery. This category includes the computer itself, which is often referred to as the central processing unit (CPU), and all of its support equipments.

. .HardwareThe term software refers tocomputer programsand the manuals (if any) that support them.

( ) .SoftwareData are facts that are used by programs to produce useful information.


DataProcedures are the policies that govern the operation of a computer system.


ProceduresPeople mean the end user of the Systems. Every CBIS (Computer Based Information System) needs people if it is to be useful.

. CBIS ( ) .