Workshop technique: submitting an outline for review

I've been a member of the same peer speculative fiction writing workshop for decades now. In addition to the usual stories and novels, we've commented on plays intended for the stage, plays intended for historic sites, essays, and other forms of prose.

A couple of our members like submitting outlines of something they are planning to write. These pose some specific challenges to a workshop, so I thought I'd run through some suggestions on how to get the most out of your workshop if you feel l...