The aim of this thesis was to identify and explore existing challenges in large-scale agile projects and to provide recommendations on how to optimize release planning and tracking methods under Scrum in a complex multi-team software development environment. Importance of velocity and effort estimations, as well as visibility and allocation of user stories in a multi-team setting were particularly addressed in this study. The results of this study include empirical findings related to agile release planning and tracking methods in a complex agile development environment to support more accurate decision-making. New management tools were developed for practical use, which support the main results of this thesis.The findings are based on an actual case study and full-time thesis work at Nokia Siemens Networks. The results were presented to the leadership team and management of the organization where I worked, and demonstrated practical benefit for the case company. Additionally, this thesis includes a practical application of results to highlight how improved visibility could support better release planning and tracking in multi-team agile software development projects. The tools proved to be useful and were put to deployment in the case company.
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