Large-Scale Scrum (LeSS) is used since 2005 and is used for lean and agile development of big product groups. LeSS aims to stay within the constraints of the standard Scrum rules. This framework can be used up to eight teams of eight people each. An additional framework called LeSS Huge can be used for up to a few thousand people on one product. It is therefore a scaled up version of the one-team Scrum, and it maintains many of the practices and ideas. The framework includes a single product backlog because it’s for a product, not for a team. There is one definition of done for all teams. At the end of each sprint there is one potentially shippable product increment. There is one product owner and many complete, cross-functional and no single-specialist teams. In LeSS all teams are in a common sprint to deliver a common shippable product every sprint.