information requirements

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information requirements

[‚in·fər′mā·shən rə′kwīr·məns]
(computer science)
Actual or anticipated questions which may be posed to an information retrieval system.

information requirements

The information needed to support a business or other activity. Systems analysts turn information requirements (the what and when) into functional specifications (the how) of an information system.

Details and Summaries
Requirements are typically defined as lists of detailed transactions, such as orders and purchases, as well as summarized data from master records, such as customers, vendors and employees. How frequently this information is made available is also part of the requirement.

A Group of Data Elements
The actual information is a collection of data elements that are obtained by running query and report programs against a particular database or group of databases. The data and information that are stored in the databases in the first place are also derived from the information requirements. See functional specification and desirement.

References in periodicals archive ?
An estimation showed that inaccurate requirement specifications might cost in excess of one hundred times what would have been required if the errors were discovered during information requirement analysis (Roman, April 1985; Shemer, 1987).
Information requirement analysis is an error prone process, especially for novice information analysts.
In this article, a cognitive process model of information requirement analysis is constructed on the basis of the structure-mapping model of analogy.
Then this research will discuss Gentner's structure-mapping model of analogy and explain why it is a good choice as a basis for modeling the cognitive process of information requirement analysis.
This section will first review the research studies concerning the influence of the knowledge of information analysts on the performance of information requirement analysis.
The research into the influence of the knowledge of information analysts on the performance of information requirement analysis has been conducted in two categories: knowledge availability and knowledge organization (Schenk, Vitalari, & Davis, 1998).
First, coherence is the goal of information analysts in specifying information requirements.
It is well recognized that richer domain knowledge and modeling knowledge are the qualities of expert information analysts for better performance in specifying information requirements.
In an experiment to test users' ability to validate information requirements, Nosek and Ahrens (1986) found that compared to data flow diagrams, task oriented menus, which were believed to be closer to users' cognitive models, were better understood by users.
Third, the cognitive model provides a framework to view and to compare important aspects of information requirements.
Current research into the process of information requirement analysis has focused on answering the question of what factors influence the performance of information analysts in specifying information requirements.
On the basis of the theories of text comprehension, coherence is assumed to be the goal of information analysts in specifying information requirements.

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