Unified Availability Model (UAM) is a universal quantitative framework for evaluating system and business-contour availability across heterogeneous IT architectures. It provides a common language for reasoning about technical dependencies, service degradation, and business-level impact in distributed environments.
UAM is an applied research and engineering framework developed under AstraVerge Research. Its purpose is to support consistent availability assessment across infrastructure, applications, integrations, and business contours without reducing the problem to a single technology stack or monitoring platform.
UAM is not limited to classical uptime accounting. It is intended to describe how the condition of technical components affects higher-level service behavior and, ultimately, the operational availability of business capabilities.
The model is designed for heterogeneous environments in which systems differ in architecture, observability maturity, criticality, and dependency structure, yet must still be evaluated within a unified analytical framework.
UAM is built on several interlocking principles:
A central idea of UAM is that availability is not merely the binary presence or absence of service. It is a derived property emerging from the structured condition of interconnected objects, channels, and support relations.
Under this view, partial degradation, saturation, bottlenecks, and dependency failures are treated as analytically relevant states. This allows UAM to represent operational reality more faithfully than models based only on incidents or SLA breach events.
UAM can be applied to multiple levels of an architectural landscape, including:
Modern IT landscapes combine diverse technologies, monitoring sources, and architectural styles. In such environments, availability assessments often become fragmented: infrastructure teams, application teams, and business stakeholders operate with different metrics and incompatible interpretations of system state.
UAM addresses this fragmentation by introducing a shared quantitative model in which heterogeneous observations can be translated into a common evaluative space. This makes it possible to compare objects of different kinds, propagate degradation across dependency chains, and express business-relevant impact in a structurally coherent form.
UAM belongs to the applied layer of AstraVerge research and is structurally connected to other frameworks, including:
UAM is an active framework under development. Its conceptual model, metric system, normalization methods, and implementation patterns may evolve across versions depending on research progress and engineering application.
Where applicable, individual publications, specifications, and formal versions are referenced separately.