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Using active-passive with health detection and controlled standby promotion would not implement appropriately synchronized active-active service distribution.

Performing a controlled end-to-end restore and functional validation would not implement appropriately synchronized active-active service distribution.

Defining a 30-minute RTO and choosing tested recovery infrastructure that meets it would not implement appropriately synchronized active-active service distribution.

Single active role after failover validates promotion. That check cannot demonstrate remove one node and observe uninterrupted service plus state consistency.

Time end-to-end restoration from failure declaration to usable transactions. That check cannot demonstrate remove one node and observe uninterrupted service plus state consistency.

Restore in isolation and execute a known business transaction. That check cannot demonstrate remove one node and observe uninterrupted service plus state consistency.

Only one node should normally serve the role. That does not establish a passive-only backup wastes available active capacity.

The business requires a maximum service restoration time. That does not establish a passive-only backup wastes available active capacity.

Backup completion is not proof of recoverability. That does not establish a passive-only backup wastes available active capacity.

Implementing appropriately synchronized active-active service distribution would not meet the need for active-passive with health detection and controlled standby promotion.

Performing a controlled end-to-end restore and functional validation would not meet the need for active-passive with health detection and controlled standby promotion.

Running a tabletop scenario using documented decisions and communications would not meet the need for active-passive with health detection and controlled standby promotion.

Remove one node and observe uninterrupted service plus state consistency. That check cannot demonstrate stop the primary and check standby becomes authoritative without split brain.

Restore in isolation and execute a known business transaction. That check cannot demonstrate stop the primary and check standby becomes authoritative without split brain.

Conduct a tabletop and timed provisioning simulation against the RTO. That check cannot demonstrate stop the primary and check standby becomes authoritative without split brain.

A passive-only backup wastes available active capacity. That does not establish only one node should normally serve the role.

Backup completion is not proof of recoverability. That does not establish only one node should normally serve the role.

A load balancer routes requests only to backends that satisfy its configured health checks. The missing change involves only one node should normally serve the role.

Using a warm site with prepared infrastructure and restorable data would not run a tabletop scenario using documented decisions and communications.

Implementing appropriately synchronized active-active service distribution would not run a tabletop scenario using documented decisions and communications.

Performing a controlled end-to-end restore and functional validation would not run a tabletop scenario using documented decisions and communications.

Recalculate repair intervals from time-stamped outages. That check cannot demonstrate record participant decisions, timing and unresolved dependencies.

An HTTP 404 after a successful TCP connection indicates an application resource or path mismatch. That check cannot demonstrate record participant decisions, timing and unresolved dependencies.

Test application recovery using the staged environment. That check cannot demonstrate record participant decisions, timing and unresolved dependencies.

Using active-passive with health detection and controlled standby promotion would not perform a controlled end-to-end restore and functional validation. Recovery requires usable application state and dependencies.

Implementing appropriately synchronized active-active service distribution would not perform a controlled end-to-end restore and functional validation. Recovery requires usable application state and dependencies.

Selecting a cold recovery site with space and utilities but limited preinstalled IT would not perform a controlled end-to-end restore and functional validation.

Remove one node and observe uninterrupted service plus state consistency. That check cannot demonstrate restore in isolation and execute a known business transaction.

Single active role after failover validates promotion. That check cannot demonstrate restore in isolation and execute a known business transaction.

Conduct a tabletop and timed provisioning simulation against the RTO. That check cannot demonstrate restore in isolation and execute a known business transaction.

Only one node should normally serve the role. That does not establish backup completion is not proof of recoverability.

The recovery requirement permits lengthy equipment provisioning. That does not establish backup completion is not proof of recoverability.

A passive-only backup wastes available active capacity. That does not establish backup completion is not proof of recoverability.