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He points to the NCX-10 and says, "You have on this machine only so many hours available for production--what is it. . . 600, 700 hours?" "It's around 585 hours a month," says Ralph. "Whatever is available, the demand is even greater," says Jonah. "If you lose one of those hours, or even half of it, you have lost it forever. You cannot recover it someplace else in the system. Your throughput for the entire plant will be lower by whatever amount the bottleneck produces in that time. And that makes an enormously expensive lunch break."