Even if the amount of time that each process took was exactly the same, the small batch production approach still would be superior, and for even more counterintuitive reasons. For example, imagine that the letters didn’t fit in the envelopes. With the large-batch approach, we wouldn’t find that out until nearly the end. With small batches, we’d know almost immediately. What if the envelopes are defective and won’t seal? In the large-batch approach, we’d have to unstuff all the envelopes, get new ones, and restuff them. In the small-batch approach, we’d find this out immediately and have no
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