The planning fallacy: why projects usually take longer than the estimate
Hofstadter's law: why a project runs late even after you add extra time
Burned by a late project, you double your next estimate, to be safe. In 1979, the writer Douglas Hofstadter turned what happens next into a joke law, and it still holds.
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Your list for the delivery app says three weeks, and you have learned your lesson, so you double it: six weeks, you tell Miva. The extra time is a safety margin, often called a buffer.
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The delivery app goes online after seven weeks. Late again, margin and all.
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