Final answer:
The emergency operations center of Rheagen College failed to consider the staff needed to meet EOC operations requirements in their planning.
Step-by-step explanation:
The factor that the emergency operations center of Rheagen College failed to effectively consider in their planning is staff to meet EOC operations requirements. By not adequately planning for a backup or alternative personnel, the center is unable to meet the needs of on-scene responders when key personnel are out sick. This highlights the importance of having a contingency plan in place to ensure continuity of operations even in unforeseen circumstances.