expression of requirements
A good expression of requirements should be one of the earliest products of any system-development project, and for a project of significant size it is of crucial importance, not least because errors introduced at the requirements stage tend to be the most expensive to correct. Since it is the first reasonably complete description of any given system, its production presents several significant problems. In particular it may be necessary to obtain information from many individuals, none of whom have a full understanding of all aspects of the envisaged system. There may therefore be a need to resolve several confused, incomplete, and inconsistent views in order to produce a single coherent whole.
The expression of requirements is a primary vehicle for communication between the procurers of a system and its developers. Since it is unreasonable to expect potential users of a system to understand software-oriented expressions of requirements, it is useful to distinguish between user requirements and system or software requirements. User requirements are stated briefly in natural language using the jargon of the problem domain and primarily defining the nature of the problem to be solved by the computer-based system. This description should be free from any solution bias. System or software requirements represent the first step toward a solution to the problem and should be based on an abstract model but omitting any detailed design or implementation bias.
"expression of requirements." A Dictionary of Computing. . Encyclopedia.com. (December 15, 2018). https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/expression-requirements
"expression of requirements." A Dictionary of Computing. . Retrieved December 15, 2018 from Encyclopedia.com: https://www.encyclopedia.com/computing/dictionaries-thesauruses-pictures-and-press-releases/expression-requirements
Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).
Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.
Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:
Modern Language Association
The Chicago Manual of Style
American Psychological Association
- Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
- In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.