The Engineering Roles of Requirements and Specification

Elisabeth Strunk, Carlo Furia, Matteo Rossi, John Knight & Dino Mandrioli
The distinction between requirements and specification is often confused in practice. This obstructs the system validation process, because it is unclear what exactly should be validated, and against what it should be validated. The reference model of Gunter et al. addresses this difficulty by providing a framework within which requirements can be distinguished from specification. It separates world phenomena from machine phenomena. However, it does not explain how the characterization can be used to help...
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