PI Planning is one of the events that aligns teams on a train. PI Planning is a cadence-based event for the entire Agile Release Train (ART) that aligns teams and stakeholders to a shared mission and vision. PI Planning provides an opportunity for the ART to review the business context and priorities, identify and resolve dependencies and risks, and commit to a realistic and achievable plan for the next Program Increment (PI). PI Planning is essential to SAFe: If you are not doing it, you are not doing SAFe1