Before revision: Daniel Kahneman who, along with Amos Tversky, proposed the fallacy The planning fallacy is a phenomenon in which predictions about how much time will be needed to complete a future task display an optimism bias and underestimate the time needed.
After revision: Visual metaphor of planning fallacy The planning fallacy is a phenomenon in which predictions about how much time will be needed to complete a future task display an optimism bias and underestimate the time needed.