I apologize that I wasn't as clear as I thought.
So, let's start over.
On Sheet1, I have the following, which has the names, when they started in the role, number of months in the role & the number of accounts they have opened up:

I need a formula for column J (YTD KPI Ranking) that looks at column F (the number of months) and column I (Total Accts) and based on those 2 factors, returns a value from the table on Tab 2 (see above).
So, the formula should first look at the number of months the person has been in the position. Then, look at the number of accounts opened and using the range/scale (in Columns B & C in the above Tab 2 chart), return the value/KPI Ranking. Here are the expected
results:

So Bob & Jane both opened 40 accounts. But since Jane has been around 2 months longer, her rating isn't as high as Bob's. To be rated a "3" she had to open 44-55 accounts in 10 months.
I know that if I wanted to just look up the KPI Ranking/value based on new accounts, I could use formula to look up based on the range/scale:
=VLOOKUP($I53,'KPI Ratings'!$B:$D,3)
The problem is the range changes based on the number of months in the position. The annual goal is 48. But, if you are in the role only 8 months, you aren't expected to open the same number since you weren't around for 4 of those months. So, I need to be
able to scale back from a full year goal according to the number of months they are in the position.
If I need to change the format of the table (the chart in the original post), I can. I'm just not sure what it should look like.
Thank you so much!!