Validating Input characteristics using other characteristics value in PI sh

Hi,

I am currently working with PI sheet, the requirement is to validate the input characteristics using some other characteristics values, like

Char Name | Value | Input |
Acids     | 2-3   | 2.5   |
CONC      | 10-40 | 20    | 

in this case consider the characteristic value from character Value to validate Input.

Please suggest.

Anmol.