tzállóság

tzállóság is a term used in Hungarian-language discussions of systems theory to describe the capacity of a system to preserve core functionality in the face of disturbances or changing conditions. The concept overlaps with resilience and robustness and is applied across domains such as engineering, ecology, and software.

The exact origin of the term is uncertain. It appears primarily in Hungarian-language literature and may derive from a root meaning "to endure" or "to stand firm." The initial cluster "tz" is unusual in Hungarian and is often treated as a phonetic loan. Some authors use tzállóság as a broad, context-dependent idea rather than a formal metric.

Definition and scope: tzállóság denotes a system's ability to maintain key performance indicators despite perturbations, including environmental changes, component failures, or input variability. It encompasses resistance (how little performance changes under stress), recoverability (speed of returning to baseline), and adaptivity (ability to adjust operating conditions). It is distinguished from simple reliability by emphasizing dynamic response and persistent functionality rather than a one-time failure probability.

Measurement and methods: Assessment relies on simulations, stress testing, and scenario analysis. Metrics may include perturbation tolerance, time-to-recovery, and performance deviation bounds. The concept is context-dependent; no universal standard metrics exist.

Applications and criticism: tzállóság is used in the design of infrastructure, ecosystem management, software architectures, and organizational systems. Critics note that it can be a broad, sometimes ill-defined label; rigorous, context-specific definitions are required to avoid ambiguity. See also resilience, robustness, fault tolerance, and survivability.