Final answer:
Day 1 of PI Planning includes understanding the business context, vision presentations, and team breakouts to draft objectives and iteration plans.
Step-by-step explanation:
On Day 1 of a typical PI Planning agenda, attendees engage in a comprehensive schedule of activities designed to set the tone and direction for the upcoming Program Increment. It is crucial to see the Schedule of Work for key dates of availability and due dates. To adequately prepare and allocate proper time for the activities, participants should read through the directions for all module's activities before getting started. This proactive approach is essential as they are expected to work on the course throughout the week. Day 1 activities typically include Business Context, Product/Solution vision, Architecture vision and development practices presentation, and Team breakouts where they draft their team PI objectives and plan their iterations.