Information systems
From Wikipedia, the free encyclopedia
 |
This article is in need of attention from an expert on the subject. Please help recruit one or improve this article yourself. See the talk page for details. Please consider using {{Expert-subject}} to associate this request with a WikiProject. (February 2009) |
In a general sense, the term Information System (IS) refers to a system of people, data records and activities that process the data and information in an organization, and it includes the organization's manual and automated processes. In a narrow sense, the term information system (or computer-based information system) refers to the specific application software that is used to store data records in a computer system and automates some of the information-processing activities of the organization. Computer-based information systems are in the field of information technology. The discipline of business process modelling describes the business processes supported by information systems.
Contents |
[edit] Overview
There are various types of information systems, for example: transaction processing systems, decision support systems, knowledge management systems, database management systems, and office information systems. Critical to most information systems are information technologies, which are typically designed to enable humans to perform tasks for which the human brain is not well suited, such as: handling large amounts of information, performing complex calculations, and controlling many simultaneous processes.
Information technologies are a very important and malleable resource available to executives.[1] Many companies have created a position of Chief Information Officer (CIO) that sits on the executive board with the Chief Executive Officer (CEO), Chief Financial Officer (CFO), Chief Operating Officer (COO) and Chief Technical Officer (CTO).The CTO may also serve as CIO, and vice versa. The Chief Information Security Officer (CISO), who focuses on information security within an organization, normally reports to the CIO.
In computer security, an information system is described by the following components [2]:
- Repositories, which hold data permanently or temporarily, such as buffers, RAM, hard disks, cache, etc. Often data stored in repositories is managed through a database management system.
- Interfaces, which support the interaction between humans and computers, such as keyboards, speakers, scanners, printers, etc.
- Channels, which connect repositories, such as routers, cables, etc.
[edit] Types of information systems
As new information technologies are developed, new categories emerge that can be used to classify information systems. Some examples are:
- Transaction processing systems
- Management information systems
- Decision support systems
- Expert systems
- Office Automation
- Business intelligence
[edit] Information systems development
Information technology departments in larger organizations tend to strongly influence information technology development, use, and application in the organizations, which may be a business or corporation. A serous of methodologies and processes can be used in order to develop and use an information system. Many developers have turned and used a more engineering approach such as the System Development Life cycle (SDLC)which is a systematic procedure of developing an information system through stages that occur in sequence. An Information system can be developed in house( within the organization)or outsourced. This can be accomplished by outsourcing certain components or the entire system.[3]
A computer based information system, following a definition of Langefors[4], is:
- a technologically implemented medium for recording, storing, and disseminating linguistic expressions,
- as well as for drawing conclusions from such expressions.
which can be formulated as a generalized information systems design mathematical program
[edit] Information systems development methodology
Information systems development methodology or ISDM is a tool kit of ideas, approaches, techniques and tools which system analysts use to help them translate organisational needs into appropriate Information Systems;
An ISDM is:-
'....recommended collection of philosophies, phases, procedures, rules, techniques, tools, documentation, management, and training for developers of Information Systems”. (Avison and Fitzgerald, 1988)
[edit] Information systems research
Information systems research is generally concerned with the study of the effects of information systems on the behavior of individuals, groups, and organizations.[5][6] Notable publication outlets for information systems research are the journals Management Information Systems Quarterly, Information Systems Research, Journal of the Association for Information Systems, and Communications of the Association for Information Systems.
Since information systems is an applied field, industry practitioners expect information systems research to generate findings that are immediately applicable in practice. However, that is not always the case. Often information systems researchers explore behavioral issues in much more depth than practitioners would expect them to do. This may render information systems research results difficult to understand, and has led to criticism.[7]
To study an information system itself, rather than its effects, information systems models are used, such as EATPUT.
[edit] References
- ^ Rockart et al. (1996) Eight imperatives for the new IT organization Sloan Management review.
- ^ Trcek, D., Trobec, R., Pavesic, N., & Tasic, J.F. (2007). Information systems security and human behaviour. Behaviour & Information Technology, 26(2), 113-118.
- ^ |title=Using MIS|year=2009|publisher=Kroenke|isbn=0-13-713029-5}}
- ^ Langefors, Börje (1973). Theoretical Analysis of Information Systems. Auerbach. ISBN 0-87769-151-7.
- ^ Galliers, R.D., Markus, M.L., & Newell, S. (Eds) (2006). Exploring Information Systems Research Approaches. New York, NY: Routledge.
- ^ Ciborra, C. (2002). The Labyrinths of Information: Challenging the Wisdom of Systems. Oxford, UK: Oxford University Press
- ^ Kock, N., Gray, P., Hoving, R., Klein, H., Myers, M., & Rockart, J. (2002). Information Systems Research Relevance Revisited: Subtle Accomplishment, Unfulfilled Promise, or Serial Hypocrisy? Communications of the Association for Information Systems, 8(23), 330-346.
[edit] Further reading
- Kroenke, David (2008). Using MIS - 2nd Edition.
- Lindsay, John (2000). Information Systems – Fundamentals and Issues. Kingston University, School of Information Systems
- Dostal, J. School information systems (Skolni informacni systemy). In Infotech 2007 - modern information and communication technology in education. Olomouc, EU: Votobia, 2007. s. 540 – 546. ISBN 978-80-7220-301-7.
[edit] External links
- Association for Information Systems (AIS)
- Center for Information Systems Research - Massachusetts Institute of Technology
- European Research Center for Information Systems
- Information Systems Department, The George Washington University
- Information Systems Department, UMBC
- Information Systems and Innovation Group, Department of Management , London School of Economics
- Index of Information Systems Journals
- Information Systems Network a research network from the Social Science Research Network
