Bottlenecks
The book goes on to point out the role of bottlenecks (constraints) in a manufacturing process, and how identifying them not only makes it possible to reduce their impact, but also yields a useful tool for measuring and controlling the flow of materials. Alex and his team identify the bottlenecks in their process and immediately begin to implement changes to help speed up capacity. In response to questions about the logic of using outdated technology in modern manufacturing, Alex's team brought in an old machine they received for free (which had previously been used at their plant in conjunction with two other machines) in order to increase the capacity of the NCX-10 machine, which had been identified as one of the two bottlenecks. Further more, they identified processes at the heat treat, identified as their second bottleneck, that caused massive delays in their getting product through the heat-treat and which had also caused some products to be heat-treated multiple times (to make softer and then harder again) instead of just once or not at all.
Read more about this topic: The Goal (novel)