Extreme Programming Installed

Chapter 25. How to Estimate Anything

Sometimes estimating stories seems scary. Keep your heads, stick together, and break the story down into small parts. You'll be surprised what you can do.

Let's look now at a complex story and see how we might break it down into tasks that can be estimated.

Psychic Message Management All messages displayed by the Psychic Operating System will appear in overlapping rectangles. Each rectangle is independently clickable and will come to the front of the screen before the user actually clicks it. Owing to the importance of prime numbers in getting good psychic contact, all the rectangles must have their length ...