Understanding processing times

[yko]

I'm checking the processing times for i485 at my local field office. The estimate says - 7.5 to 17.5 months. Below that it estimates employment-based cases to take 10.5 to 24 months, and family-based ones 11.5 to 25 months. How is this supposed to be interpreted?

[Enub4]

Office information glitch. They put some wrong information and the result doesn't make sense.

In my case:
Estimated 10 to 26
Employment 10.5 to 24
Family 10 to 27

[yko]

Office information glitch. They put some wrong information and the result doesn't make sense.

In my case:
Estimated 10 to 26
Employment 10.5 to 24
Family 10 to 27

Out of curiosity, I randomly chose Charleston, SC office and that info also doesn't make sense. Extremely frustrating process.

[yko]

For at least 4 different locations, I noticed that employment and family based estimates are the same, 10.5-24 and 11.5-25, respectively, but the numbers on the top vary.

[USCISucks]

The first number means 50% of cases are adjudicated by then. The second number means 90% of cases are. Then you look at the date that they say is out of normal times to get the last bit so you can inquire with USCIS as to why its outside that range.