In the Book "Scrum A pocket Guide " written by Gunther Verheyen in chapter 2.6.3 pages 66-70 he explains with nice diagrams two different feedback systems (open and closed) and give two examples of closed loop feedback (inspect and adapt) in scrum events : daily scrum (24h) and Sprint.
Other Sprint events (Sprint Retrospective , Sprint planing, Sprint review) are obviously also feedback loops (inspect and adapt).
But what a about activities such as "Release Planing" , is it also feedback-loop?
I think yes it is , because it usually will be adapted/updated (re-planing) based on new inputs , for example after each increment and current measured velocity of team.
What is your oponion? is rel. Planing a feedback loops?
Release Planning isn't a Scrum event, so there's no hard-and-fast rule about whether or not it involves explicit feedback loops. It could be done in a continuum where feedback is much more implicit (backlog refinement/grooming is done this way).
In this implicit case, release management isn't so much about release planning as it is about release orchestration.