If your favorite candidate has too few votes to win, your vote will be transferred to your next favorite, if possible.
If your favorite candidate has more than enough votes, some ballots may be partially transferred so that all winners represent roughly equal numbers of voters.
The formula for the threshold is:
So if 100 votes were cast:|
Note that it is possible for candidates to win without reaching the threshold if they are the only ones left. This is especially likely if a large number of ballots end up with all of their choices eliminated.
|total votes - threshold|
This ensures that all winners represent constituencies of similar size, and that people don't avoid voting for popular candidates, thinking that they will get elected anyway.