[TeMPOraL]

> In reality, as we shall see later, high levels of capacity utilization are actually a primary cause of long cycle time.

So what's the reason explained by the book?

(My guess would be something along the lines of: high level of utilization lead to sudden peaks in load exceeding available capacity, and thus throwing a wrench in the process as you scramble to add capacity.)

[jwhitlark]

100% use of nearly anything is over use, not just because of peaks in load, but because it must both be done and perfect.

Think of a bookcase. 100% means you can never add more books, and it also makes it very difficult to reorganize anything.