The capability of a ↑system to operate as intended despite the presence of (hardware or software) ↑faults .
The CPRE Glossary
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.
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Fault
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Fault toleranceNote:
Fault tolerance may be stated as a ↑quality requirement .
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Functional requirement
A ↑requirement concerning a result or ↑behavior that shall be provided by a function of a ↑system .
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Functionality
The capabilities of a ↑system as stated by its ↑functional requirements .