Make the bottlenecks work only on what will contribute to throughput today … not nine months from now. That's one way to increase capacity at the bottlenecks. The other way you increase bottleneck capacity is to take some of the load off the bottlenecks and give it to non-bottlenecks.
The Goal: A Process of Ongoing Improvement (ed. Routledge, 2016) - ISBN: 9781351982115