Learn in the textbookContinuous Improvement and Automation of Development and Operations
DefinitionRetrospective (レトロスペクティブ) is the English-derived name for a retrospective (ふりかえり). In Scrum, it is defined as an event called the sprint retrospective (スプリントレトロスペクティブ), held at the end of each sprint (the unit of one development iteration).
ExplanationIts content is the same as a retrospective: the team looks back at people, methods, tool use and the like in the sprint just finished and decides on improvements for the next sprint. In Scrum, it comes after the sprint review (スプリントレビュー), where the finished work is shown to stakeholders for feedback.
Memory hookRetro means backward and spective means looking. It is the same retro as in retro fashion, so "looking backward" is exactly what 振り返り means.