Good start. Maybe label them differently though: * Great * Typical * Horrible (I intentionally avoided the word 'normal' here due to it implying an average

Good start. Maybe label them differently though: * Great * Typical * Horrible (I intentionally avoided the word 'normal' here due to it implying an average instead of a median.) And a proposal for what to do with these three inputs: Have three internal counters: * Good * Neutral * Bad 'Great' increments 'good' by 1/2, decrements 'neutral' by 1/3, and decrements 'bad' by 1/6. 'Typical' increments 'neutral' by 2/3 and decrements 'good' and 'bad' by 1/3 each. 'Horrible' increments 'bad' by 1/2, decrements 'good' by 1/3, and decrements 'neutral' by 1/6. Show the end users and the drivers the rating graphically by just stacking the three counters next to each other horizontally. Edit: Note that I indeed mean INCREMENTS, I do NOT mean "multiplies the current value by".