It works based on two principles:

  1. Our brains are naturally good at estimating the size of things relative to each other.
  2. We can learn from experience to make better decisions about the future.

But there’s a lot more to the story. That’s why I’ve put together a short collection of essays on the subject below along with my go-to downloadable Reference Story Board, a key piece of the Agile estimation toolkit.

Applied Frameworks-Reference-Story-Board