Felstestet

Felstestet refers to a testing approach that focuses on assessing how a system behaves when faults or erroneous conditions occur. The term is used in some Nordic software testing literature and practice, and it is not a universally standardized designation. In general, felstestet encompasses techniques that deliberately introduce faults, errors, or abnormal conditions to verify system resilience, error handling, and fail-safe behavior.

Etymology and usage context

The word combines terms for fault and testing. In practice, felstestet may appear in documentation, training materials, or project-specific testing plans within industries that emphasize reliability and safety. Because it is not a formal standard, its exact scope and methods can vary between organizations and regions.

Key concepts and methods

Felstestet often includes fault injection, negative testing, and resilience or robustness testing. Fault injection involves deliberately perturbing software, hardware, or networks to observe fault propagation and recovery. Negative testing checks system responses to invalid inputs or unexpected sequences. In safety-critical domains, felstestet is used to verify that failures are handled gracefully and that fail-operational or fail-safe modes are correctly engaged. Related practices include chaos engineering, boundary testing, and stress testing.

Applications and relevance

Industries such as automotive, aerospace, medical devices, and embedded systems frequently require rigorous fault-tolerance validation. Standards like ISO 26262 and IEC 61508 influence how fault tolerance and error handling are demonstrated, though felstestet itself is not a stand-alone standard.

Challenges and metrics

Challenges include reproducing faults, ensuring repeatability, and balancing thoroughness with cost. Common metrics are fault coverage, mean time to detect, and the rate of successful fail-safe responses.

See also

Fault injection, negative testing, robustness testing, resilience engineering.