You’re assuming 0% scrap rate, and discounting setup time, teardown time, general down time. Also, most likely they don’t run them for a full year. They need 1

You’re assuming 0% scrap rate, and discounting setup time, teardown time, general down time. Also, most likely they don’t run them for a full year. They need 1mm Macbooks in a window of a few months. In which case, 10,000 machines making 100 macbooks each makes sense. Edit: also, this is assuming every machine is the same machine doing the same thing. Which most likely is not (unless the unibodies are made in one go on a 5-axis mill)