Imagine that your org has adopted scrum, all teams are doing retros, some of action points receive management attention, sometimes even got solved. But still there is some feeling that bigger problems, which are holding your company back, cannot either be addressed or even acknowledge, just because these problems are dispersed through the whole organization an in a single team we might see only a fraction of it. So it is important to get the whole group together and get everyone heard.

How to form and get group's opinion? What kind of techniques you can use to organize such sessions in your organization? How the org will benefit from it?