say you have 1,111 machines

1000 assembly line machines

100 robots that oversee the 1000 machines

10 robots to oversee those

and 1 robot to oversee them all

obviously, the 1000 assembly line macines account for 90% of the total machines (1000 / 1111). and so on and so forth.

how would one express the amount of responsibility each machine with respect how many machines it is overseeing, so that you know which machines are a priority to maintain? would you simply calculate the recipricols of the percentage of machines at each stage?