Starting an Agile Release Train (ART) without a System Team in place can lead to reduced collaboration between teams during the Program Increment (PI) Planning event. The System Team plays a vital role in supporting the ART by addressing system-level issues and enabling integration across different teams. Without this support, teams may face challenges in integrating their work with others, leading to silos and reduced collaboration. The presence of a System Team is essential for facilitating effective communication and collaboration during PI Planning, ensuring that teams can work together efficiently and that dependencies are managed properly12.