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IEVref:192-10-19ID:
Language:enStatus: Standard
Term: recovery block scheme
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Definition: form of fault-tolerant software design in which several diverse modules are invoked in sequence to perform a given task until one of them is successful

Note 1 to entry: Each of the modules is capable of performing the given task, but in a different way. ‘Success’ is judged by the fact that the output satisfies an acceptance test performed by an adjudicator. A module in the sequence is invoked only if all earlier modules fail.

Note 2 to entry: If a module fails then backward error recovery is performed before invoking the next module.

Note 3 to entry: The recovery block scheme is an example of standby redundancy.


Publication date:2015-02
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