In this case, a good helper will be
The Scaled Agile Framework (SAFe)
that encompasses a set of principles, processes, and best practices that helps larger organizations to develop and deliver high-quality products and services faster. The Scaled Agile Framework is particularly well-suited to complex projects that involve multiple large teams at the project, program, and portfolio levels.
It takes four sprints, or about two months, to develop each increment. There is also the fifth sprint. It's called a HIP sprint
(Hardening, Innovation, Planning):
Ensure that all program increment objectives are achieved, and technical debt is reduced.
Provide time for teams to generate new ideas, or introduce some innovations.
Conduct sprint retrospective and complete the planning of the next Program Increment.
Such kind of programming helps to come up with new ideas for improvements and solutions to the current problems.