Basic Information Concepts
Information is meaningfully interpreted data. If I give you a number 1-212-290-4700, it does not make any sense on its own. It is just raw data. However if I say Tel: +1-212-290-4700, it starts making sense. It becomes a telephone number. If I gather some more data and record it meaningfully like:
Address: 350 Fifth Avenue, 34th floor New York, NY 10118-3299 USA Tel: +1-212-290-4700 Fax: +1-212-736-1300
It becomes very useful information - the address of New York office of Human Rights Watch, a nonprofit, nongovernmental human rights organization.
So from a system analyst's point of view information is a sequence of symbols that can be construed to a useful message.
An Information System is a system that gathers data and disseminates information with the sole purpose of providing information to its user.
Main object of an information system is to provide information to its users and Information systems vary according to the type of users that use the system.
A Management Information System is an information system that evaluates, analyzes and processes an organization's data to produce meaningful and useful information on which the management will take right decision to ensure future growth of the organization.
According to Wikipedia:
"Information can be recorded as signs, or transmitted as signals. Information is any kind of event that affects the state of a dynamic system that can interpret the information.
Conceptually, information is the message (utterance or expression) being conveyed. Therefore, in a general sense, information is "Knowledge communicated or received concerning a particular fact or circumstance". Information cannot be predicted and resolves uncertainty."
Information Vs Data:
Data is unprocessed facts and figures. Plain collected data, as raw facts cannot help in decision making. However, data is the raw material that is organized, structured and interpreted to create useful information systems.
Data is defined as 'groups of nonrandom symbols in the form of text, images, voice representing quantities, action and objects'.
Information is interpreted data; created from organized, structured and processed data in a particular context.
According to Davis and Olson:
"Information is a data that has been processed into a form that is meaningful to recipient and is of real or perceived value in the current or the prospective action or decision of recipient."
Information, Knowledge & Business Intelligence
Professor Ray R. Larson of the School of Information at the University of California, Berkeley provides an Information Hierarchy, which is:
Data - The raw material of information
Information - Data organized and presented by someone
Knowledge - Information read, heard, or seen, and understood
Wisdom - Distilled and integrated knowledge and understanding
Scott Andrews' explains Information Continuum as follows:
Data - A Fact or a piece of information, or a series thereof
Information - Knowledge discerned from data
Business Intelligence - Information Management pertaining to an organization's policy or decision-making, particularly when tied to strategic or operational objectives
Information /data Collection Techniques
The most popular data collection techniques include:
Surveys: A questionnaires is prepared to collect the data from the field.
Secondary data sources or archival data: data is collected through old records, magazines, company website etc.
Objective measures or tests: An experimental test was conducted on the subject and data was collected.
Interviews: In which data is collected by the system analyst by following a rigid procedure and collecting the answers to a set of pre-conceived questions through personal interviews.