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Agile Estimating and Planning by Mike Cohn

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Chapter 4. Estimating Size with Story Points

“In a good shoe, I wear a size six, but a seven feels so good, I buy a size eight.”

—Dolly Parton in Steel Magnolias

Suppose a new restaurant opens nearby, and you decide to try it. For the first course, you can have either a cup or a bowl of soup. You can have the entrée as either a full or half portion. And you can have either a small or a large soda. You’ve probably been to many restaurants like this and can quite easily order about the right amount of food without asking how many ounces are in the cups and bowls of soup and exactly how big the entrée portions are. At most, you may ask the server something like “How big is the salad?” The server will likely respond by holding his hands apart to ...

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