information systems basics

1. Information Systems Meena Chauhan,Mtech CSE ABES Engg.College

2. Outline Definitions Types of Information Systems Information Systems Vs Information Technology Expanding Roles of IS Classification of IS Enterprise Resource Planning Information Systems Development IS as Discipline Information systems: Opportunities and Challenges Conclusion

3. Definitions Data Raw facts such as an employee’s name and number of hours worked in a week, inventory part numbers or sales orders. Information A collection of facts organized in such a way that they have additional value beyond the value of the facts themselves. Data Information $35,000 12 Units $12,000 J. Jones Western Region $100,000 100 Units 35 Units Data Processing Salesperson: J. Jones Sales Territory: Western Region Current Sales: 147 Units = $147,000

6. Computer-based Information System An Information System is an organized combination of people, hardware, software, communication networks and the data resources that collects, transforms and disseminates information in a organization.

7. IS Vs IT INFORMATION TECHNOLOGY Hardware Software Databases Networks Other related components are used to build INFORMATION SYSTEMS Payroll System Inventory System Marketing System Customer Service System

9. A four level pyramid model of different types of Information Systems based on the different levels of hierarchy in an organization

10. Information Systems relationship to Information Technology, Computer Science, Information Science, and Business

12. Classification of IS Information Systems Operations Support System Management Support System Transaction processing systems Process control systems Office automation systems Management information systems Decision support systems Executive information systems

19. Information Systems Development

20. IS as Discipline IS is an interdisciplinary field influenced by Computer Science, Political Science, Psychology, Operations Research, Linguistics, Sociology, and Organizational Theory.

24. In the past decade, the nature of IS has undergone a dramatic change, from mainframe-based IS to client / server computing to today's web-based information system, with the Internet having made the revolution. The four powerful worldwide changes that have altered the business environment are: 1. Globalization; 2. rise of the information economy; 3. transformation of the business enterprise; 4. emergence of the digital firm.

25. Conclusion Information Systems are indispensable to the business, industry, academia and any organization to meet the future challenges

28. Distributed Information Systems

29. Distributed Information System (DIS) is seen as a collection of autonomous in­formation systems which can collaborate with each other. This collaboration can be driven by requests for knowledge needed to predict what values should replace null values in missing or incomplete attributes.

30. Distributed information system is a system that connects a number of information systems using network communication technology. It is assumed that DIS is autonomous and incomplete .

31. Distributed development of software and information systems (also named Global Software Development) becomes increasingly common, driven by the globalisation of companies and their business and enabled by new information and communication technologies.

32. Distributed Information Systems Development (DISD) promotes realisation of IS in a collaborative way where several partners, generally situated in distant places, participate in the elaboration of a common solution. The DISD consists in decomposing the IS development process into more or les autonomous phases to be realised by these partners.

33. DISD aims at increasing enterprise productivity, reducing IS development cost, and enlarging the number of human competencies and skills, which allows not only to share experiences in different cultural environments but also to extend enterprise strategy to the global market. In fact, this kind of practice allows enterprises to deal with new economic globalisation constraints that they have to undergo but it is not devoid of problems. It is clear that the distribution of processes has an impact on the way the IS products will be specified, designed, coded and delivered to the clients.