It never occurred to me that there's overarching system to it, with jargon and all that.

What I've always done in that kind of situation is write down what is proposed (or use my imagination to write down what I would like to see happen), make out a list of people who might have something useful to say about the whole project, or some particular aspect of it (including suggesting other people who might have something useful to say about it), and ask them to comment.

And then start the process over again, taking in the comments. And do the sums on costs etc.