This talk focuses around a series of diagrams that help explain how various practices work.

Many practices work to different degrees of success depending on exactly how they’re implemented. We’ll discuss why this is so, with examples of multiple ways to do pair programming, testing, and planning. Along the way, we’ll show some new work: how to get a better plan by not estimating, models to identify which practices to experiment on, and how to find what to vary.

Each concept will be explained with diagrams that get to the gist of the practice - and methods of thinking about variations.