Just like with any kind of consensus (reaching terms accepted by all of the parties), it is just not always possible, especially in large communities. I was in one community of around 3-4 people, and sometimes we still failed to reach common terms.
In a community of 10 users, reaching consensus is often impossible, there will always be someone unsatisfied.
So, here is what we have tried. After some time dedicated to discussion, which must be specified, or after a certain number of members asked for it, we voted if consensus wasn't reached.
After some time, the discussion usually boils down to choosing one of a few options, most often there were two. This is akin to Stack Exchange voting on Meta.
Consensus is good if you reach it, but again, most of the time it's simply not possible to sastisfy everyone. If you try, you end up with a one-size-fits-nobody solution that makes everybody uncomfortable.