When discussions take place, a vote can start. Votes take place for a variety of reasons. When a vote is taking place, users will vote for one of the options. If the user chooses, he/she can give a reason why he/she votes for one. Some voting will be open to all registered users, some only for rollbacks or higher. However, all users are entitled to adding their opinions under comments, even if they can't vote. Just because the vote may not count, doesn't mean your opinion shouldn't be heard or taken into consideration.
At the end of the week the option that has at least 3+ over the other option will be the winning decision. If the vote is tied or does not yet have a 3+ majority, the voting will remain open until it does.