The Stage Planning is a joint tactical level planning for the stage that consists out of multiple Sprints.
The Product Owner presents in the Stage Planning the prioritized tactial Tactical Product Backlog-entries. (Features). These should reflect (and implement) the strategic objectives (Epic). After the presentation of the product backlog the teams work to gain a common understanding of the work to be done in the Stage Following that the Teams jointly estimate which features they are able deliver in that stage.
Duration: 4h per Stage-month
Im Scaled Agile Framework (SAFe) wird die Stage Planning als Release Planning bezeichnet.