Critical infrastructure guide
Redundancy in Critical Systems
How alternate components, routes and providers can reduce single points of failure.
Systems note: infrastructure classifications, standards and responsibilities vary by country and operator. Use current local requirements for real decisions.
Why this matters
How alternate components, routes and providers can reduce single points of failure.
Core system ideas
Redundancy is useful only when the alternate path is truly independent of the same failure cause.
Two systems located together or sharing the same power, network or supplier can look redundant while failing together.
Redundancy adds cost and maintenance obligations, so criticality should guide where it is justified.
What to review
Useful reviews usually combine service criticality, dependencies, condition, capacity, maintenance, alternate arrangements, restoration time and clear ownership rather than relying on one isolated metric.