What is Scrum?
Answer
Scrum is the most widely adopted Agile framework for developing, delivering, and sustaining complex products. It is defined by a lightweight set of rules in the Scrum Guide (maintained by Ken Schwaber and Jeff Sutherland, its co-creators). Scrum organizes work into Sprints (time-boxed iterations of 1–4 weeks), uses three accountabilities (Product Owner, Scrum Master, Developers), maintains three artifacts (Product Backlog, Sprint Backlog, Increment), and conducts five events (Sprint, Sprint Planning, Daily Scrum, Sprint Review, Sprint Retrospective). Scrum's core theory is built on empiricism (decisions based on observation and experience) and lean thinking (reduce waste, focus on essentials). It is intentionally incomplete — prescribing only what is essential and leaving the rest to practitioners.