His study revealed that out-of-round holes in the code tube headers created a "snowball" bottleneck effect
downstream in the section assembly department--excessive rolling-in time, leakers to fix, hydrostatic tests to conduct and repeat.
There might have been even more but for the small-shop bottleneck effect
: As Judd's work came to be more and more concentrated with a single mechanic (working in a roped-off "Judd area" of a larger business that made other products), shifting that worker away from new production to restoration work brought new production to a halt.
(17) This limited genetic diversity is widely interpreted as the result of a bottleneck effect
in which the founding Asian groups that crossed the Bering land bridge possessed limited genetic diversity.
He added: "Options include extending the use of marker-poles behind the start line and basic things such as widening some of the gaps through which the horses come on to the track before starting, to avoid the bottleneck effect
which sometimes results in a rush for the tape before the starter is ready to let the runners go."