progressing from one stage to another in a single series of steps; sequential.
If that's correct than that means accuracy, penetration etc stats change after they cross their thresholds.
If that is actually NOT what is intended, than I believe the word meaning here is "dynamic".
If the penetration value goes 50% between mid and far when you're 50% between mid and far ranges, that is dynamic. If it remains at far till your cross the mid threshold, I'd say that is sequential.