The software testing technical terms - not only for ISTQB® Certified Tester Download PDF


The backup operational mode in which the functions of a system that becomes unavailable are assumed by a secondary system.


An event in which a component or system does not perform a required function within specified limits. [Reference: After ISO 24765]

failure modeUK

The physical or functional manifestation of a failure. [Reference: ISO 24765]

Failure Mode and Effect AnalysisUK

A systematic approach to risk identification and analysis of identifying possible modes of failure and attempting to prevent their occurrence. - See also: Failure Mode, Effect and Criticality Analysis

failure rateUK

The ratio of the number of failures of a given category to a given unit of measure. [Reference: ISO 24765]

false-negative resultUK

A test result which fails to identify the presence of a defect that is actually present in the test object.