Which event most often leads to service disruptions?

Which event most often leads to service disruptions?

• A. An accident
• B. A scheduled shutdown
• C. An unscheduled shutdown
• D. A staff shortage

Answer: (C)

The main idea is that interruptions in service usually come from things that fail or trip unexpectedly. An unscheduled shutdown happens when equipment faults or protection systems trip without warning, so the service is cut off until the issue is found and fixed. This kind of unplanned disruption tends to occur more often than planned maintenance windows (scheduled shutdowns), accidents (which are relatively rare events), or staffing gaps (which may delay restoration but don’t necessarily cause a full outage). So, because unscheduled outages are the most common form of unexpected interruption, they’re the best answer.

The main idea is that interruptions in service usually come from things that fail or trip unexpectedly. An unscheduled shutdown happens when equipment faults or protection systems trip without warning, so the service is cut off until the issue is found and fixed. This kind of unplanned disruption tends to occur more often than planned maintenance windows (scheduled shutdowns), accidents (which are relatively rare events), or staffing gaps (which may delay restoration but don’t necessarily cause a full outage). So, because unscheduled outages are the most common form of unexpected interruption, they’re the best answer.