This post takes into review Agile Retrospectives Making Good Teams Great book by Esther Derby and Diana Larsen, foreword by Ken Schwaber . The book teaches how to organize and lead retrospectives from A to Z from the conceptual point of view.
The traditional circles and soup technique is performed usually on retrospectives of not successful sprints. The technique could be used for release and project retrospectives as well. Basing on my observations there are very often small successes even in failed sprints. The circles and soup technique does not respect them. I would like to present here my extension to the circles and soup technique which I use at work. I call it multiverse circles because this one introduces the parallel positive universe in addition to the impediments base.