Felkorridor

Felkorridor is a term that appears in Swedish-language engineering and risk literature, translating roughly to “error corridor” or “fault corridor.” In general, it refers to a defined range of operational conditions or parameter values in which a system exhibits degraded performance or errors but remains functional, as opposed to regions of nominal operation or complete failure. The concept helps analyze resilience and tolerance to disturbances by identifying margins between normal operation and fault states. Etymology: fel meaning fault or error, korridor meaning corridor.

Usage and interpretation can vary by domain. In control systems, felkorridor may denote the set of state-space trajectories that produce acceptable but not ideal outputs, guiding corrective actions and monitoring thresholds. In safety engineering, it designates a buffer zone where monitoring detects anomalies but results remain within acceptable risk levels, triggering maintenance, isolation, or alarms before a genuine failure occurs. In software testing, it can describe the range of inputs that produce non-critical errors instead of crashes or system outages.

Relation to similar concepts: It overlaps with margin of safety, fault tolerance, tolerance bands, and degradation states. In practice, teams may document felkorridor in risk registers or operation manuals to support decision-making about interventions, alarms, and maintenance planning.

See also: margin of safety, fault tolerance, resilience engineering, diagnostic thresholds.

Notes: Because felkorridor is not a widely standardized term, its precise definition and scope should be checked within the relevant organization or field to ensure consistent usage.