The basis for successful RE is a common understanding of the terms used. The CPRE Glossary covers the core terms of Requirements Engineering—it is the central reference work across all CPRE modules and levels!
The glossaries are also available in various languages for download.
The CPRE Glossary: An overview of the most important Requirements Engineering terms
Please note that the definitions of terms in the glossaries are deliberately in English only in order to exclude any ambiguities or scope for interpretation that may result from translations.
The way in which a ↑system reacts to stimuli, changes its state and produces observable results.
Stimuli may be events or changes of conditions. Their origin may be external or system-internal.
A ↑model describing the ↑behavior of a ↑system , e.g., by a ↑state machine.
A ↑requirement stating a business ↑goal , objective or need of an organization.
Business requirements typically state those business goals, objectives and needs that shall be achieved by employing a ↑system or a collection of systems.