The Sprint Retrospective is a time-boxed event for the Scrum Team to inspect how the last Sprint went and plan for improvements in the next Sprint. The Scrum Guide states that "The Sprint Retrospective concludes the Sprint. It is timeboxed to a maximum of three hours for a one-month Sprint. For shorter Sprints, the event is usually shorter."1 This means that the Sprint Retrospective should be held at the end of each Sprint, regardless of the project or release status. The Sprint Retrospective is an opportunity for the Scrum Team to inspect itself and create a plan for improvements, including to product quality and working relationships.1 References:
* 1: The Scrum Guide2, page 16
* 2: The Scrum Guide