For most of our software engineering projects, we use Scrum with 2–3 week iterations. For small and midsize projects with clearly defined and unchanging requirements, projects requiring formal approvals (governmental projects and projects for big corporations), and projects with strict compliance requirements, we can opt for Waterfall. In software support and evolution projects, we mostly follow Kanban. Naturally, in many projects, it makes sense to use a combination of approaches or switch from one to another depending on the project stage. In our practice, the most common scenarios are ‘Waterfall -> Scrum’, ‘Scrum -> Kanban -> Scrum.’