The document summarizes lessons learned from using Agile project management practices in a telecommunications project. It describes how using Scrum did not work well due to challenges with multiple teams, external dependencies, and changing requirements. The project then transitioned to using ScrumBan practices, which involved limiting work-in-progress, prioritizing issues, and reorganizing teams. This approach allowed for more ad-hoc planning and improved productivity, quality, and comfort of work compared to Scrum.