Which general time window is typical for escalating a BES disturbance to a Regional Entity?

• A. Within the first hour
• B. Within 24 hours
• C. Within 5 minutes
• D. Within 2 hours

Answer: (A)

Prompt escalation of a BES disturbance to a Regional Entity is essential for rapid, coordinated reliability actions. The typical window is within the first hour after the disturbance is identified because this allows the responsible operator, the Reliability Coordinator, and the Regional Entity to quickly assess severity, share accurate information, and mobilize necessary resources or protective actions across entities and neighboring regions. Delays longer than an hour can impede timely coordination, while much shorter windows are often impractical for gathering meaningful data and confirming the situation. A 24-hour window is far too long for anything that could affect BES reliability, and a two-hour window, while perhaps workable in some contexts, is not the standard practice for prompt regional escalation. Thus, escalation within an hour best balances speed with the need for reliable information and coordinated response.