Services and functions to maintain
Dependable supply and connectivity across connected networks.
Network resilience involves assets distributed across locations and organisational boundaries. An impairment may reduce capacity locally while affecting services elsewhere. Define the supplied service, its required quality and the users who depend on it, then examine how alternative paths, storage, spare capacity and restoration resources change the consequences.
Relevant assets and dependencies
- Generation, treatment, storage, distribution and network-control assets support service delivery.
- Power, communications, remote control, access and supplier support can create dependencies between networks.
- Demand, environmental conditions and the availability of response teams influence restoration options.
A network fault affects several essential services
A local power interruption also affects water pumping and communications equipment. Each operator sees a different part of the same disruption.
Establish the dependent services, alternative capacity and time-sensitive constraints. Coordinate restoration and temporary support, then verify service at the affected delivery points as well as at the repaired asset.
This example supports discussion of the framework. It describes no measured result or prescribed operating procedure.
Decisions TAR helps inform
- Determine which services are affected and how reduced capacity changes restoration priorities.
- Evaluate alternative supply paths, temporary arrangements and planned interventions within relevant operating constraints.
- Coordinate action across network operators and dependent organisations, with clear ownership of assumptions and updates.
Evidence of the intended outcome
Select evidence that reflects the service, its agreed limits and the consequences of impairment.
- Extent, duration and quality of service affected, including differences between customer groups.
- Tests of alternative supply arrangements and actual restoration performance.
- Records of inter-operator coordination, residual constraints and lessons from exercises or incidents.
Record the baseline, assumptions and any remaining constraints. Review what the intervention achieved and use the findings to improve future decisions.
Explore the six outcome domainsConnected environments
Data centres are treated separately because their service and facility dependencies need specific attention. Communications networks and energy supplies remain important dependencies of those facilities.