Learn in the textbookComponents of Scrum
DefinitionScrum (スクラム) is a leading framework (フレームワーク) of agile development (アジャイル開発) that builds a product step by step through repeated short iterations.
ExplanationScrum fixes only a minimal set of rules, such as the team's roles, a repeating time box (the Sprint), and lists for managing the work (the backlogs), leaving the detailed procedures to the team. Each iteration checks a working result and uses what it shows to adjust the next plan, which suits development whose course is hard to foresee.
AnalogyIt is like painting a large mural one section a week instead of all at once, showing each section to the client and hearing their reaction before deciding how to paint the next.
Memory hookThe name comes from the rugby scrum, where players bind shoulder to shoulder and push as one. Picture the whole team driving forward together.