THE TAKEAWAY The Map Is Not the Terrain. Don’t fall in love with your plan. It’s almost certainly wrong. Only Plan What You Need To. Don’t try to project everything out years in advance. Just plan enough to keep your teams busy. What Kind of Dog Is It? Don’t estimate in absolute terms like hours—it’s been proven that humans are terrible at that. Size things relatively, by what breed of dog the problem is, or T-shirt size (S, M, L, XL, XXL), or, more commonly, the Fibonacci sequence. Ask the Oracle. Use a blind technique, like the Delphi method, to avoid anchoring biases such as the halo effect
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