Iteration planning
Iteration planning is the team-level event at the start of each SAFe iteration (typically 2 weeks) where the team selects stories from its backlog to commit to, breaks them into tasks, and confirms team capacity. The output is the iteration backlog and the iteration goal, both visible to the rest of the ART.
SAFe's iteration planning is the equivalent of Scrum's sprint planning, with one important addition: the team plans against the PI Objectives committed at PI Planning, not against a fresh backlog each iteration. This couples short-term planning to medium-term commitments and reduces the iteration-by-iteration thrash that loosely coupled Scrum teams sometimes experience. The discipline: at iteration planning, the team confirms it can still meet the PI commitments given new information and capacity changes, and surfaces risk to the RTE if it cannot.