In the R21 regional status, which color represents 75% Operational (Slightly Degraded)?

• A. Yellow
• B. Orange
• C. Red
• D. Green

Answer: (A)

In the R21 regional status, colors are used to show how much of the system is truly operational. Yellow is the color assigned to about 75% operational, described as Slightly Degraded. This means most functions are still working, but there are noticeable issues or reduced performance that you’d want to monitor and address before things slip further.

That’s why Yellow is the best match for 75% operational: it signals a warning state that’s not yet critical, with a need for attention to prevent more degradation. Green would suggest full operation, Orange indicates a deeper level of degradation, and Red points to severe problems or outages. If you see Yellow, you’d typically investigate the underlying causes of the minor degradation and track recovery.