Change Score Calculation in SAP SSM

Hi

I have the requirement to change the score value on KPI level from the actual value to a fixed value:

Value Range in Score Converted Score <881 >88<962 >95<104 3 >103<111 4 >110 5

In the sample below I would like to replace the value 81.1 with the value 1 and the value 89 with 2

Any advice on how I can achieve this in SSM

Regards

Koos