What action should be taken regarding redundancy in criticality?

When addressing redundancy in criticality, it is essential to recognize that both units in a redundant system typically serve the same function and are intended to provide backup for each other. By assigning both units the same criticality ranking, you acknowledge that each unit is equally important to the operational integrity and reliability of the system. This approach emphasizes the need for both units to be maintained and operated at similar levels of importance to ensure that if one fails, the other can seamlessly take over without compromising safety, performance, or reliability.

Assigning the same criticality ranking helps in resource allocation, risk assessment, and maintenance prioritization, ensuring that both units receive adequate attention to function correctly together. This balanced perspective is crucial for any redundancy strategy as it fosters a holistic understanding of the system's reliability needs and promotes effective decision-making regarding maintenance practices, spare parts, and operational protocols.

In contrast, prioritizing one unit over the other can lead to an imbalance in maintenance and operational readiness, possibly putting the entire system at risk if the higher-priority unit fails while the other is not adequately supported. Similarly, using probabilistic modeling or reducing the overall number of units may not address the core requirement of ensuring that redundancy effectively supports the system's reliability objectives.