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how do we optimize the use of the bottlenecks? There are two principal themes on which you need to concentrate . . . "First, make sure the bottlenecks' time is not wasted," he says. "How is the time of a bottleneck wasted? One way is for it to be sitting idle during a lunch break. Another is for it to be processing parts which are already defective--or which will become defective through a careless worker or poor process control. A third way to waste a bottleneck's time is to make it work on parts you don't need."