If you need a junior to senior round, to make sure your juniors speak their own opinion, you frankly have really big issues in my eyes.
The key is to make an environment where people will share ideas and work on improving them as a team or a unit regardless of their status/position. At least if that is your goal.
You do this by using honesty, assertion and openness. If there are parts of the decision making that aren’t up for discussion, then you make sure everyone understands that and then you let them discuss the rest while making sure everyone understands that being polite and affirming is required for good team work, even if someone thinks an idea or opinion is bad.
I realize tech companies are notoriously bad at this. The army reference, and the fact that it’s getting any sort of traction here is a good example of this. The junior to senior strategy makes a lot of sense in the army, but that is an environment where you own 100% of the decision making as a XO, and you’re not using the method to make a decision, because you’ve already made it, you are simply asking your crew for opinions to make sure there isn’t an angle you have missed. Not only that, but you’ll often be asking people who come from different teams and may not know each other very well, in an environment where you’re under a lot of pressure. That’s almost the exact opposite of what you are doing in any private sector meeting.
If you’re a CEO who’ve gathered all your middle managers to figure out how to trim the staff by 20%, by all means go junior to senior, but if you’re trying to brainstorm something with a team of developers, just don’t.
Disclaimer: I’m Scandinavian, management may be more authoritative in America than it is here.