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System reliability describes a system's ability to deliver services consistently over time, tolerate faults, and maintain expected availability. It covers design principles, redundancy, observability, and operational processes for failure handling and recovery, evaluating trade-offs between cost, performance, and complexity. The goal is measurable dependabil…
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The ability of a system to perform its intended function reliably over time and under expected conditions.
System reliability developed from the practice known as reliability engineering, which predicts, prevents and manages failures in complex technical systems. Today it combines quantitative reliability analysis with resilient software and operational design.
Reliability comes from preventing, detecting and recovering from faults. Measures such as failure rate, availability and recovery time show how architectural choices affect service operation.
The approach provides shared language for the system context under consideration.
Relationships, processes or measures make the effects of decisions traceable.
The approach connects failure analysis with concrete measures for redundancy, detection and recovery.
System reliability supports setting availability goals, error budgets and recovery measures for dependable services.
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