SCRUM
Метод управления проектами, набор принципов, ценностей, политик, на которых строится процесс SCRUM-разработки, позволяющий в жестко фиксированные и небольшие по времени итерации, называемые спринтами (sprints), предоставлять конечному пользователю работающий продукт с новыми бизнес-возможностями, для которых определен наибольший приоритет.

Scrum is one Agile methodology that emphasizes the dynamics of each iteration, specifying various roles, meetings and workflow processes. In particular, Scrum separates the role of product owner, responsible for the vision, priorities, and release schedule of a product, from that of Scrum master, responsible for facilitating meetings and ensuring that processes are both well-designed and enforced. Another Agile methodology, Extreme Programming (XP), emphasizes efficient and purpose-driven development processes with multiple levels of feedback.
The SCRUM methodology specifies iterations by fixed blocks of time, and cuts back on the scope of work as needed (time-boxing).

A sprint is a short, time-boxed period when a scrum team works to complete a set amount of work.