Introduction to Scrum Patterns Scrum is simple, easy to understand, and a bit difficult to master. The Scrum Guide is a little booklet that describes the rules of Scrum. But understanding the rules only doesn’t make a team great. A team continuously needs to learn, practice, and think. At a certain point, the team will come up with a question. “Why Scrum works?” Scrum Patterns may help you deep-dive into Scrum and seek for the answer.