Sprint Planning is the event that kicks off the Sprint by deciding what can be delivered and how. The whole Scrum Team participates, and it is time-boxed to a maximum of eight hours for a one-month Sprint (proportionally less for shorter ones).
What it produces
Planning answers three questions and produces two outputs:
WHY The Product Owner proposes a Sprint Goal (the objective).
WHAT The team selects Product Backlog items it believes it can finish.
HOW The Developers plan enough of the work to start.
OUTPUTS: a Sprint Goal + a Sprint Backlog
