> A factory is a parallel system. A car factory can come close to fully > utilizing thousands of human and robot workers.
as long as we're using wrong analogies, keep in mind that: - a car factory can also come to a standstill if one or more resources arrive at a rate slower than they're being consumed at; - a factory's line can be brought to a standstill if one of its elements breaks; - a factory's workers need to be scheduled to work in shifts and you must always have enough workers for each critical position to keep the line going; - a factory 's line is at least as slow as its slowest worker and so on. last but not least: - if all the workers at a car factory came to work at the same time they wouldn't be able to get through the door.
