Fred Brooks dropping truth bombs from "The Mythical Man-Month" that every PM conveniently forgets during sprint planning. The classic fallacy that's been haunting software projects since 1975: throwing more developers at a late project just makes it later. You know what happens when you add that fifth developer to your "almost done" feature? Now you've got four people explaining the codebase, one confused newbie, and zero progress for two weeks.
Some tasks are inherently sequential. You can't parallelize pregnancy, and you can't parallelize understanding a gnarly legacy codebase or debugging that one race condition that only happens in production. But try explaining that to management when they're convinced that doubling the team will halve the timeline. Spoiler: it won't.
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