Data ProcessingInformation The basic information system model Data ProcessingInformation Data Storage The basic model with data storage Figure:-6.1:- Basic.
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Data ProcessingInformation The basic information system model Data ProcessingInformation Data Storage The basic model with data storage Figure:-6.1:- Basic information Systems Model
Application subsystems Order entry and billing Payroll and personal Marketing management Inventory accounting and management Application subsystem makes use of functional subsystems Data base system Data communications Operating Systems Utility Software Hardware Etc. Figure:6.2:- Basic Information Systems Model
Files Transaction processing Operational control reports (b) Control reports Transaction output Transactions Files Transaction processing (a) Transaction Inquiry response Operational report processing Inquiry Files (c) Inquiry Processing Figure:6.3:- Processing to support operational control.
Processing Programs Data base Inquiry Processing Decision models Problem analysis model Variance reporting Planning/budget models Requests inquiries problems Etc Plans and budgets Scheduled reports, Special reports Analyses decision for review inquiry responses Other Budgets, standards, plans. etc Transaction based files Figure:6.4:- Management Control database and processing support
Sort processdisseminate Customer Suppliers Business Units Functional departments Competitors Others Data collection Classify RetrieveDuplicate Goals and mission store ACTION Decision maker-n Decision maket-2 Decision maker-1 Figure:-6.1:data are collected from different sources and processed using a series of steps
CATEGORIES OF INFORMATION SYSTEMS TRANSACTION PROCESSING(TP) MANAGEMENT INFORMAION SYSTEM(MIS) Intelligent support systems (ISS), which consist of decision support systems (DSS), executive information systems (EIS), and expert systems (ES). Information Systems are classified in four types of information systems: Office automation systems (OAS)
D ECISION SUPPORT SYSTEMS(DSS) D ecision support systems (DSS) are interactive, well-integrated systems that provide managers with data, tools, and models to facilitate semi structured decisions or tactical decisions. How a DSS works A DSS accesses and processes large volumes of internal and external data and integrates them with various decision-making models. Internal data are often downloading from the TPS or from other information systems. Internal Data External Data Decision-making Models Alternative solutions to problems “ What-if” analysis Goal seeking
Word processing Desktop publishing Electronic mail Voice mail Video conferencing Image Fax E. m. systems Multimedia Knowledge Workers Office automation systems Clerical workers Figure:6.5:-An Office automation system (OAS) is designed to increase productivity and enhance communications in the workplace.
Methods and procedures Computer software Information System IPO Component Data Storage IPO Component (Process) Internal control component Data (Input) Business system (environment) Figure:6.6:- The Input process- Output Components of the Information