We refer to these as locked, so there's not much that can be done for these capabilities.
In these cases, it's because moving the scale even a little bit would get us out of that linear relationship. For example, for some capacities, if you tried to decrease them, you'd get to zero pretty quickly, or you'd have a ratio that wouldn't be sustainable. You'd get virtually zero capacity, but you'd be stuck with a very high ratio of indirect and overhead costs, so that wouldn't be very helpful.
It's the same if you were to increase it by 25%. You would probably need to incur significant and disproportionate capital expenditures, so the tool wouldn't be that helpful in these cases. That's why these capacities are locked.