Imagine a scenario where the default value for a temperature is 20°C. Is there a word that you can use to say that if you do X you add 2°C to that value, if you do Y you minus 7°C to that value and if you do Z you add 1°C.
I want to explain that `for each action you apply a ...'
I can think of two words that are similar:
You could say you apply a handicap - as you would in golf
Or you apply a multiplier
The following question :What is a word similar to "multiplier" but for addition (or subtraction) suggests addend or subtrahend but again this implies a positive or negative direction.