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Figure 2 - REQUIREMENTS Management Process
Requirements Definition Each individual requirement must be well defined. IEEE Standard 610.12-1990 defines a requirement as: a) A condition or capability needed by a user to solve a problem or achieve an objective. b) A condition or capability that must be met or possessed by a system or system component to satisfy a contract, standard, specification, or other formally imposed document. c) A documented representation of a condition or capability as in definition (a) or (b).
In other words, the individual requirement shall be clear, concise, measurable, and testable. Here’s an example of a poor requirement: The system must process school records every day. Here’s an example of a well defined requirement: The system must process 20,000 school records each day (Monday through Friday) at a minimum process speed of 15,000 records per hour between 2:00 and 4:00 pm each afternoon. A well-defined set of requirements, per The Institute of Electrical and Electronics Engineers (IEEE) in Std. 1233-1998, will provide specific benefits: · A basis for agreement between the customer and the suppliers detailing the final expectations of the product · Reduction in the development effort (This is accomplished through detailed analysis, reducing a need for redesign later in the process). · A basis for estimating resource requirements · A baseline for subsequent verification and validation · An easier transfer of the final product to users · A basis for enhancement · A method for tracing design elements back to requirements
Date: 2015-02-16; view: 885
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